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Network Working Group S. Hollenbeck
Request for Comments: 5730 VeriSign, Inc.
STD: 69 August 2009
Obsoletes: 4930
Category: Standards Track
Extensible Provisioning Protocol (EPP)
Abstract
This document describes an application-layer client-server protocol
for the provisioning and management of objects stored in a shared
central repository. Specified in XML, the protocol defines generic
object management operations and an extensible framework that maps
protocol operations to objects. This document includes a protocol
specification, an object mapping template, and an XML media type
registration. This document obsoletes RFC 4930.
Status of This Memo
This document specifies an Internet standards track protocol for the
Internet community, and requests discussion and suggestions for
improvements. Please refer to the current edition of the "Internet
Official Protocol Standards" (STD 1) for the standardization state
and status of this protocol. Distribution of this memo is unlimited.
Copyright Notice
Copyright (c) 2009 IETF Trust and the persons identified as the
document authors. All rights reserved.
This document is subject to BCP 78 and the IETF Trust's Legal
Provisions Relating to IETF Documents in effect on the date of
publication of this document (http://trustee.ietf.org/license-info).
Please review these documents carefully, as they describe your rights
and restrictions with respect to this document.
Table of Contents
1. Introduction ....................................................3
1.1. Conventions Used in This Document ..........................3
2. Protocol Description ............................................4
2.1. Transport Mapping Considerations ...........................7
2.2. Protocol Identification ....................................8
2.3. Hello Format ...............................................8
2.4. Greeting Format ............................................8
2.5. Command Format ............................................12
2.6. Response Format ...........................................13
2.7. Protocol Extension Framework ..............................16
2.7.1. Protocol Extension .................................16
2.7.2. Object Extension ...................................17
2.7.3. Command-Response Extension .........................18
2.8. Object Identification .....................................18
2.9. Protocol Commands .........................................19
2.9.1. Session Management Commands ........................19
2.9.1.1. EPP <login> Command .......................20
2.9.1.2. EPP <logout> Command ......................22
2.9.2. Query Commands .....................................23
2.9.2.1. EPP <check> Command .......................23
2.9.2.2. EPP <info> Command ........................25
2.9.2.3. EPP <poll> Command ........................26
2.9.2.4. EPP <transfer> Query Command ..............30
2.9.3. Object Transform Commands ..........................31
2.9.3.1. EPP <create> Command ......................32
2.9.3.2. EPP <delete> Command ......................33
2.9.3.3. EPP <renew> Command .......................34
2.9.3.4. EPP <transfer> Command ....................35
2.9.3.5. EPP <update> Command ......................38
3. Result Codes ...................................................39
4. Formal Syntax ..................................................45
4.1. Base Schema ...............................................45
4.2. Shared Structure Schema ...................................56
5. Internationalization Considerations ............................59
6. IANA Considerations ............................................59
7. Security Considerations ........................................60
8. Acknowledgements ...............................................61
9. References .....................................................62
9.1. Normative References ......................................62
9.2. Informative References ....................................62
Appendix A. Object Mapping Template ..............................64
Appendix B. Media Type Registration: application/epp+xml .........66
Appendix C. Changes from RFC 4930 ................................67
1. Introduction
This document describes specifications for the Extensible
Provisioning Protocol (EPP) version 1.0, an XML text protocol that
permits multiple service providers to perform object-provisioning
operations using a shared central object repository. EPP is
specified using the Extensible Markup Language (XML) 1.0 as described
in [W3C.REC-xml-20040204] and XML Schema notation as described in
[W3C.REC-xmlschema-1-20041028] and [W3C.REC-xmlschema-2-20041028].
EPP meets and exceeds the requirements for a generic registry
registrar protocol as described in [RFC3375]. This document
obsoletes RFC 4930 [RFC4930].
EPP content is identified by MIME media type application/epp+xml.
Registration information for this media type is included in an
appendix to this document.
EPP is intended for use in diverse operating environments where
transport and security requirements vary greatly. It is unlikely
that a single transport or security specification will meet the needs
of all anticipated operators, so EPP was designed for use in a
layered protocol environment. Bindings to specific transport and
security protocols are outside the scope of this specification.
The original motivation for this protocol was to provide a standard
Internet domain name registration protocol for use between domain
name registrars and domain name registries. This protocol provides a
means of interaction between a registrar's applications and registry
applications. It is expected that this protocol will have additional
uses beyond domain name registration.
XML is case sensitive. Unless stated otherwise, XML specifications
and examples provided in this document MUST be interpreted in the
character case presented to develop a conforming implementation.
1.1. Conventions Used in This Document
The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT",
"SHOULD", "SHOULD NOT", "RECOMMENDED", "MAY", and "OPTIONAL" in this
document are to be interpreted as described in [RFC2119].
In examples, "C:" represents lines sent by a protocol client and "S:"
represents lines returned by a protocol server. Indentation and
white space in examples are provided only to illustrate element
relationships and are not REQUIRED features of this protocol. A
protocol client that is authorized to manage an existing object is
described as a "sponsoring" client throughout this document.
2. Protocol Description
EPP is a stateful XML protocol that can be layered over multiple
transport protocols. Protected using lower-layer security protocols,
clients exchange identification, authentication, and option
information, and then engage in a series of client-initiated command-
response exchanges. All EPP commands are atomic (there is no partial
success or partial failure) and designed so that they can be made
idempotent (executing a command more than once has the same net
effect on system state as successfully executing the command once).
EPP provides four basic service elements: service discovery,
commands, responses, and an extension framework that supports
definition of managed objects and the relationship of protocol
requests and responses to those objects.
An EPP server MUST respond to client-initiated communication (which
can be either a lower-layer connection request or an EPP service
discovery message) by returning a greeting to a client. A server
MUST promptly respond to each EPP command with a coordinated response
that describes the results of processing the command. The following
server state machine diagram illustrates the message exchange process
in detail:
|
V
+-----------------+ +-----------------+
| Waiting for | Connected | Prepare |
| Client |----------------->| Greeting |
+-----------------+ or <hello> +-----------------+
^ |
| Close Connection Send |
| or Idle Greeting |
+-----------------+ V
| End | Timeout +-----------------+
| Session |<-----------------| Waiting for |
+-----------------+ | Client |
^ ^ ^ Send +-------->| Authentication |
| | | Response | +-----------------+
| | | +--------------+ |
| | | | Prepare Fail | | <login>
| | +-----| Response | | Received
| | Send +--------------+ V
| | 2501 ^ +-----------------+
| | Response | | Processing |
| | +---------| <login> |
| | Auth Fail +-----------------+
| | Timeout |
| +-------------------------------+ | Auth OK
| | V
| +-----------------+ <hello> +-----------------+
| | Prepare |<----------| Waiting for |
| | Greeting |---------->| Command or |
| +-----------------+ Send | <hello> |
| Send x5xx Greeting +-----------------+
| Response +-----------------+ Send ^ |
+-----------| Prepare | Response | | Command
| Response |----------+ | Received
+-----------------+ V
^ +-----------------+
Command | | Processing |
Processed +----------| Command |
+-----------------+
Figure 1: EPP Server State Machine
EPP commands fall into three categories: session management commands,
query commands, and object transform commands. Session management
commands are used to establish and end persistent sessions with an
EPP server. Query commands are used to perform read-only object
information retrieval operations. Transform commands are used to
perform read-write object management operations.
Commands are processed by a server in the order they are received
from a client. Though an immediate response confirming receipt and
processing of the command is produced by the server, the protocol
includes features that allow for offline review of transform commands
before the requested action is actually completed. In such
situations, the response from the server MUST clearly note that the
command has been received and processed but that the requested action
is pending. The state of the corresponding object MUST clearly
reflect processing of the pending action. The server MUST also
notify the client when offline processing of the action has been
completed. Object mappings SHOULD describe standard formats for
notices that describe completion of offline processing.
EPP uses XML namespaces to provide an extensible object management
framework and to identify schemas required for XML instance parsing
and validation. These namespaces and schema definitions are used to
identify both the base protocol schema and the schemas for managed
objects. The XML namespace prefixes used in examples (such as the
string "foo" in "xmlns:foo") are solely for illustrative purposes. A
conforming implementation MUST NOT require the use of these or any
other specific namespace prefixes.
All XML instances SHOULD begin with an <?xml?> declaration to
identify the version of XML that is being used, optionally identify
use of the character encoding used, and optionally provide a hint to
an XML parser that an external schema file is needed to validate the
XML instance. Conformant XML parsers recognize both UTF-8 (defined
in RFC 3629 [RFC3629]) and UTF-16 (defined in RFC 2781 [RFC2781]);
per RFC 2277 [RFC2277], UTF-8 is the RECOMMENDED character encoding
for use with EPP.
Character encodings other than UTF-8 and UTF-16 are allowed by XML.
UTF-8 is the default encoding assumed by XML in the absence of an
"encoding" attribute or a byte order mark (BOM); thus, the "encoding"
attribute in the XML declaration is OPTIONAL if UTF-8 encoding is
used. EPP clients and servers MUST accept a UTF-8 BOM if present,
though emitting a UTF-8 BOM is NOT RECOMMENDED.
Example XML declarations:
<?xml version="1.0" encoding="UTF-8" standalone="no"?>
<?xml version="1.0" standalone="no"?>
<?xml version="1.0" encoding="UTF-8"?>
<?xml version="1.0"?>
2.1. Transport Mapping Considerations
As described previously, EPP can be layered over multiple transport
protocols. There are, however, a common set of considerations that
MUST be addressed by any transport mapping defined for EPP. These
include:
- The transport mapping MUST preserve command order.
- The transport mapping MUST address the relationship between
sessions and the client-server connection concept.
- The transport mapping MUST preserve the stateful nature of the
protocol.
- The transport mapping MUST frame data units.
- The transport mapping MUST be onto a transport, such as TCP
[RFC0793] or Stream Control Transmission Protocol (SCTP)
[RFC4960], that provides congestion avoidance that follows RFC
2914 [RFC2914]; or, if it maps onto a protocol such as SMTP
[RFC5321] or Blocks Extensible Exchange Protocol (BEEP) [RFC3080],
then the performance issues need to take into account issues of
overload, server availability, and so forth.
- The transport mapping MUST ensure reliability.
- The transport mapping MUST explicitly allow or prohibit
pipelining.
Pipelining, also known as command streaming, is when a client sends
multiple commands to a server without waiting for each corresponding
response. After sending the commands, the client waits for the
responses to arrive in the order corresponding to the completed
commands. Performance gains can sometimes be realized with
pipelining, especially with high-latency transports, but there are
additional considerations associated with defining a transport
mapping that supports pipelining:
- Commands MUST be processed independent of each other.
- Depending on the transport, pipelining MAY be possible in the form
of sending a complete session in a well-defined "batch".
- The transport mapping MUST describe how an error in processing a
command affects continued operation of the session.
A transport mapping MUST explain how all of these requirements are
met, given the transport protocol being used to exchange data.
2.2. Protocol Identification
All EPP XML instances MUST begin with an <epp> element. This element
identifies the start of an EPP protocol element and the namespace
used within the protocol. The <epp> start element and the associated
</epp> ending element MUST be applied to all structures sent by both
clients and servers.
Example "start" and "end" EPP elements:
<epp xmlns="urn:ietf:params:xml:ns:epp-1.0">
</epp>
2.3. Hello Format
EPP MAY be carried over both connection-oriented and connection-less
transport protocols. An EPP client MAY request a <greeting> from an
EPP server at any time between a successful <login> command and a
<logout> command by sending a <hello> to a server. Use of this
element is essential in a connection-less environment where a server
cannot return a <greeting> in response to a client-initiated
connection. An EPP <hello> MUST be an empty element with no child
elements.
Example <hello>:
C:<?xml version="1.0" encoding="UTF-8" standalone="no"?>
C:<epp xmlns="urn:ietf:params:xml:ns:epp-1.0">
C: <hello/>
C:</epp>
2.4. Greeting Format
An EPP server responds to a successful connection and <hello> element
by returning a <greeting> element to the client. An EPP greeting
contains the following elements:
- An <svID> element that contains the name of the server.
- An <svDate> element that contains the server's current date and
time in Universal Coordinated Time (UTC).
- An <svcMenu> element that identifies the services supported by the
server, including:
o One or more <version> elements that identify the protocol
versions supported by the server.
o One or more <lang> elements that contain the identifiers of the
text response languages known by the server. Language
identifiers MUST be structured as documented in [RFC4646].
o One or more <objURI> elements that contain namespace URIs
representing the objects that the server is capable of
managing. A server MAY limit object management privileges on a
per-client basis.
o An OPTIONAL <svcExtension> element that contains one or more
<extURI> elements that contain namespace URIs representing
object extensions supported by the server.
o A <dcp> (data collection policy) element that contains child
elements used to describe the server's privacy policy for data
collection and management. Policy implications usually extend
beyond the client-server relationship. Both clients and
servers can have relationships with other entities that need to
know the server operator's data collection policy to make
informed provisioning decisions. Policy information MUST be
disclosed to provisioning entities, though the method of
disclosing policy data outside of direct protocol interaction
is beyond the scope of this specification. Child elements
include the following:
* An <access> element that describes the access provided by
the server to the client on behalf of the originating data
source. The <access> element MUST contain one of the
following child elements:
+ <all/>: Access is given to all identified data.
+ <none/>: No access is provided to identified data.
+ <null/>: Data is not persistent, so no access is
possible.
+ <personal/>: Access is given to identified data relating
to individuals and organizational entities.
+ <personalAndOther/>: Access is given to identified data
relating to individuals, organizational entities, and
other data of a non-personal nature.
+ <other/>: Access is given to other identified data of a
non-personal nature.
* One or more <statement> elements that describe data
collection purposes, data recipients, and data retention.
Each <statement> element MUST contain a <purpose> element, a
<recipient> element, and a <retention> element. The
<purpose> element MUST contain one or more of the following
child elements that describe the purposes for which data is
collected:
+ <admin/>: Administrative purposes. Information can be
used for administrative and technical support of the
provisioning system.
+ <contact/>: Contact for marketing purposes. Information
can be used to contact individuals, through a
communications channel other than the protocol, for the
promotion of a product or service.
+ <prov/>: Object-provisioning purposes. Information can
be used to identify objects and inter-object
relationships.
+ <other/>: Other purposes. Information may be used in
other ways not captured by the above definitions.
* The <recipient> element MUST contain one or more of the
following child elements that describes the recipients of
collected data:
+ <other/>: Other entities following unknown practices.
+ <ours>: Server operator and/or entities acting as agents
or entities for whom the server operator is acting as an
agent. An agent in this instance is defined as a third
party that processes data only on behalf of the service
provider for the completion of the stated purposes. The
<ours> element contains an OPTIONAL <recDesc> element
that can be used to describe the recipient.
+ <public/>: Public forums.
+ <same/>: Other entities following server practices.
+ <unrelated/>: Unrelated third parties.
* The <retention> element MUST contain one of the following
child elements that describes data retention practices:
+ <business/>: Data persists per business practices.
+ <indefinite/>: Data persists indefinitely.
+ <legal/>: Data persists per legal requirements.
+ <none/>: Data is not persistent and is not retained for
more than a brief period of time necessary to make use of
it during the course of a single online interaction.
+ <stated/>: Data persists to meet the stated purpose.
* An OPTIONAL <expiry> element that describes the lifetime of
the policy. The <expiry> element MUST contain one of the
following child elements:
+ <absolute/>: The policy is valid from the current date
and time until it expires on the specified date and time.
+ <relative/>: The policy is valid from the current date
and time until the end of the specified duration.
Data collection policy elements are based on work described in the
World Wide Web Consortium's Platform for Privacy Preferences
[W3C.REC-P3P-20020416] specification.
Example greeting:
S:<?xml version="1.0" encoding="UTF-8" standalone="no"?>
S:<epp xmlns="urn:ietf:params:xml:ns:epp-1.0">
S: <greeting>
S: <svID>Example EPP server epp.example.com</svID>
S: <svDate>2000-06-08T22:00:00.0Z</svDate>
S: <svcMenu>
S: <version>1.0</version>
S: <lang>en</lang>
S: <lang>fr</lang>
S: <objURI>urn:ietf:params:xml:ns:obj1</objURI>
S: <objURI>urn:ietf:params:xml:ns:obj2</objURI>
S: <objURI>urn:ietf:params:xml:ns:obj3</objURI>
S: <svcExtension>
S: <extURI>http://custom/obj1ext-1.0</extURI>
S: </svcExtension>
S: </svcMenu>
S: <dcp>
S: <access><all/></access>
S: <statement>
S: <purpose><admin/><prov/></purpose>
S: <recipient><ours/><public/></recipient>
S: <retention><stated/></retention>
S: </statement>
S: </dcp>
S: </greeting>
S:</epp>
2.5. Command Format
An EPP client interacts with an EPP server by sending a command to
the server and receiving a response from the server. In addition to
the standard EPP elements, an EPP command contains the following
elements:
- A command element whose tag corresponds to one of the valid EPP
commands described in this document. The command element MAY
contain either protocol-specified or object-specified child
elements.
- An OPTIONAL <extension> element that MAY be used for server-
defined command extensions.
- An OPTIONAL <clTRID> (client transaction identifier) element that
MAY be used to uniquely identify the command to the client.
Clients are responsible for maintaining their own transaction
identifier space to ensure uniqueness.
Example command with object-specified child elements:
C:<?xml version="1.0" encoding="UTF-8" standalone="no"?>
C:<epp xmlns="urn:ietf:params:xml:ns:epp-1.0">
C: <command>
C: <info>
C: <obj:info xmlns:obj="urn:ietf:params:xml:ns:obj">
C: <obj:name>example</obj:name>
C: </obj:info>
C: </info>
C: <clTRID>ABC-12345</clTRID>
C: </command>
C:</epp>
2.6. Response Format
An EPP server responds to a client command by returning a response to
the client. EPP commands are atomic, so a command will either
succeed completely or fail completely. Success and failure results
MUST NOT be mixed. In addition to the standard EPP elements, an EPP
response contains the following elements:
- One or more <result> elements that document the success or failure
of command execution. If the command was processed successfully,
only one <result> element MUST be returned. If the command was
not processed successfully, multiple <result> elements MAY be
returned to document failure conditions. Each <result> element
contains the following attribute and child elements:
o A "code" attribute whose value is a four-digit, decimal number
that describes the success or failure of the command.
o A <msg> element containing a human-readable description of the
response code. The language of the response is identified via
an OPTIONAL "lang" attribute. If not specified, the default
attribute value MUST be "en" (English).
o Zero or more OPTIONAL <value> elements that identify a client-
provided element (including XML tag and value) or other
information that caused a server error condition.
o Zero or more OPTIONAL <extValue> elements that can be used to
provide additional error diagnostic information, including:
* A <value> element that identifies a client-provided element
(including XML tag and value) that caused a server error
condition.
* A <reason> element containing a human-readable message that
describes the reason for the error. The language of the
response is identified via an OPTIONAL "lang" attribute. If
not specified, the default attribute value MUST be "en"
(English).
- An OPTIONAL <msgQ> element that describes messages queued for
client retrieval. A <msgQ> element MUST NOT be present if there
are no messages queued for client retrieval. A <msgQ> element MAY
be present in responses to EPP commands other than the <poll>
command if messages are queued for retrieval. A <msgQ> element
MUST be present in responses to the EPP <poll> command if messages
are queued for retrieval. The <msgQ> element contains the
following attributes:
o A "count" attribute that describes the number of messages that
exist in the queue.
o An "id" attribute used to uniquely identify the message at the
head of the queue.
The <msgQ> element contains the following OPTIONAL child elements
that MUST be returned in response to a <poll> request command and
MUST NOT be returned in response to any other command, including a
<poll> acknowledgement:
o A <qDate> element that contains the date and time that the
message was enqueued.
o A <msg> element containing a human-readable message. The
language of the response is identified via an OPTIONAL "lang"
attribute. If not specified, the default attribute value MUST
be "en" (English). This element MAY contain XML content for
formatting purposes, but the XML content is not specified by
the protocol and will thus not be processed for validity.
- An OPTIONAL <resData> (response data) element that contains child
elements specific to the command and associated object.
- An OPTIONAL <extension> element that MAY be used for server-
defined response extensions.
- A <trID> (transaction identifier) element containing the
transaction identifier assigned by the server to the command for
which the response is being returned. The transaction identifier
is formed using the <clTRID> associated with the command if
supplied by the client and a <svTRID> (server transaction
identifier) that is assigned by and unique to the server.
Transaction identifiers provide command-response synchronization
integrity. They SHOULD be logged, retained, and protected to ensure
that both the client and the server have consistent temporal and
state-management records.
Example response without <value> or <resData>:
S:<?xml version="1.0" encoding="UTF-8" standalone="no"?>
S:<epp xmlns="urn:ietf:params:xml:ns:epp-1.0">
S: <response>
S: <result code="1000">
S: <msg lang="en">Command completed successfully</msg>
S: </result>
S: <trID>
S: <clTRID>ABC-12345</clTRID>
S: <svTRID>54321-XYZ</svTRID>
S: </trID>
S: </response>
S:</epp>
Example response with <resData>:
S:<?xml version="1.0" encoding="UTF-8" standalone="no"?>
S:<epp xmlns="urn:ietf:params:xml:ns:epp-1.0">
S: <response>
S: <result code="1000">
S: <msg>Command completed successfully</msg>
S: </result>
S: <resData>
S: <obj:creData xmlns:obj="urn:ietf:params:xml:ns:obj">
S: <obj:name>example</obj:name>
S: </obj:creData>
S: </resData>
S: <trID>
S: <clTRID>ABC-12345</clTRID>
S: <svTRID>54321-XYZ</svTRID>
S: </trID>
S: </response>
S:</epp>
Example response with error value elements:
S:<?xml version="1.0" encoding="UTF-8" standalone="no"?>
S:<epp xmlns="urn:ietf:params:xml:ns:epp-1.0">
S: <response>
S: <result code="2004">
S: <msg>Parameter value range error</msg>
S: <value xmlns:obj="urn:ietf:params:xml:ns:obj">
S: <obj:elem1>2525</obj:elem1>
S: </value>
S: </result>
S: <result code="2005">
S: <msg>Parameter value syntax error</msg>
S: <value xmlns:obj="urn:ietf:params:xml:ns:obj">
S: <obj:elem2>ex(ample</obj:elem2>
S: </value>
S: <extValue>
S: <value xmlns:obj="urn:ietf:params:xml:ns:obj">
S: <obj:elem3>abc.ex(ample</obj:elem3>
S: </value>
S: <reason>Invalid character found.</reason>
S: </extValue>
S: </result>
S: <trID>
S: <clTRID>ABC-12345</clTRID>
S: <svTRID>54321-XYZ</svTRID>
S: </trID>
S: </response>
S:</epp>
Example response with notice of waiting server messages:
S:<?xml version="1.0" encoding="UTF-8" standalone="no"?>
S:<epp xmlns="urn:ietf:params:xml:ns:epp-1.0">
S: <response>
S: <result code="1000">
S: <msg>Command completed successfully</msg>
S: </result>
S: <msgQ count="5" id="12345"/>
S: <trID>
S: <clTRID>ABC-12345</clTRID>
S: <svTRID>54321-XYZ</svTRID>
S: </trID>
S: </response>
S:</epp>
Command success or failure MUST NOT be assumed if no response is
returned or if a returned response is malformed. Protocol
idempotency ensures the safety of retrying a command in cases of
response-delivery failure.
2.7. Protocol Extension Framework
EPP provides an extension framework that allows features to be added
at the protocol, object, and command-response levels.
2.7.1. Protocol Extension
The EPP extension framework allows for definition of new protocol
elements identified using XML namespace notation with a reference to
an XML schema that defines the namespace. The <epp> element that
identifies the beginning of a protocol instance includes multiple
child element choices, one of which is an <extension> element whose
children define the extension. For example, a protocol extension
element would be described in generic terms as follows:
C:<epp>
C: <extension>
C: <!-- One or more extension elements. -->
C: <ext:foo xmlns:ext="urn:ietf:params:xml:ns:ext">
C: <!-- One or more extension child elements. -->
C: </ext:foo>
C: </extension>
C:</epp>
This document does not define mappings for specific extensions.
Extension specifications MUST be described in separate documents that
define the objects and operations subject to the extension.
2.7.2. Object Extension
EPP provides an extensible object management framework that defines
the syntax and semantics of protocol operations applied to a managed
object. This framework pushes the definition of each protocol
operation into the context of a specific object, providing the
ability to add mappings for new objects without having to modify the
base protocol.
Protocol elements that contain data specific to objects are
identified using XML namespace notation with a reference to an XML
schema that defines the namespace. The schema for EPP supports use
of dynamic object schemas on a per-command and per-response basis.
For example, the start of an object-specific command element would be
described in generic terms as follows:
C:<EPPCommandName>
C: <object:command xmlns:object="urn:ietf:params:xml:ns:object">
C: <!-- One or more object-specific command elements. -->
C: </object:command>
C:</EPPCommandName>
An object-specific response element would be described similarly:
S:<resData>
S: <object:resData xmlns:object="urn:ietf:params:xml:ns:object">
S: <!-- One or more object-specific response elements. -->
S: </object:resData>
S:</resData>
This document does not define mappings for specific objects. The
mapping of EPP to an object MUST be described in separate documents
that specifically address each command and response in the context of
the object. A suggested object mapping outline is included as an
appendix to this document.
2.7.3. Command-Response Extension
EPP provides a facility for protocol command and response extensions.
Protocol commands and responses MAY be extended by an <extension>
element that contains additional elements whose syntax and semantics
are not explicitly defined by EPP or an EPP object mapping. This
element is OPTIONAL. Extensions are typically defined by agreement
between client and server and MAY be used to extend EPP for unique
operational needs. A server-extended command element would be
described in generic terms as follows:
C:<command>
C: <!-- EPPCommandName can be "create", "update", etc. -->
C: <EPPCommandName>
C: <object:command xmlns:object="urn:ietf:params:xml:ns:object">
C: <!-- One or more object-specific command elements. -->
C: </object:command>
C: </EPPCommandName>
C: <extension>
C: <!-- One or more server-defined elements. -->
C: </extension>
C:</command>
A server-extended response element would be described similarly:
S:<response>
S: <result code="1000">
S: <msg lang="en">Command completed successfully</msg>
S: </result>
S: <extension>
S: <!-- One or more server-defined elements. -->
S: </extension>
S: <trID>
S: <clTRID>ABC-12345</clTRID>
S: <svTRID>54321-XYZ</svTRID>
S: </trID>
S:</response>
This document does not define any specific server extensions. The
mapping of server extensions to EPP MUST be described in separate
documents that specifically address extended commands and responses
in the server's operational context.
2.8. Object Identification
Some objects, such as name servers and contacts, can have utility in
multiple repositories. However, maintaining disjoint copies of
object information in multiple repositories can lead to
inconsistencies that have adverse consequences for the Internet. For
example, changing the name of a name server in one repository but not
in a second repository that refers to the server for domain name
delegation can produce unexpected DNS query results.
Globally unique identifiers can help facilitate object-information
sharing between repositories. A globally unique identifier MUST be
assigned to every object when the object is created; the identifier
MUST be returned to the client as part of any request to retrieve the
detailed attributes of an object. Specific identifier values are a
matter of repository policy, but they SHOULD be constructed according
to the following algorithm:
a. Divide the provisioning repository world into a number of object
repository classes.
b. Each repository within a class is assigned an identifier that is
maintained by IANA.
c. Each repository is responsible for assigning a unique local
identifier for each object within the repository.
d. The globally unique identifier is a concatenation of the local
identifier, followed by a hyphen ("-", ASCII value 0x002D),
followed by the repository identifier.
2.9. Protocol Commands
EPP provides commands to manage sessions, retrieve object
information, and perform transformation operations on objects. All
EPP commands are atomic and designed so that they can be made
idempotent, either succeeding completely or failing completely and
producing predictable results in case of repeated executions. This
section describes each EPP command, including examples with
representative server responses.
2.9.1. Session Management Commands
EPP provides two commands for session management: <login> to
establish a session with a server and <logout> to end a session with
a server. The <login> command establishes an ongoing server session
that preserves client identity and authorization information during
the duration of the session.
2.9.1.1. EPP <login> Command
The EPP <login> command is used to establish a session with an EPP
server in response to a greeting issued by the server. A <login>
command MUST be sent to a server before any other EPP command to
establish an ongoing session. A server operator MAY limit the number
of failed login attempts N, 1 <= N <= infinity, after which a login
failure results in the connection to the server (if a connection
exists) being closed.
A client identifier and initial password MUST be created on the
server before a client can successfully complete a <login> command.
The client identifier and initial password MUST be delivered to the
client using an out-of-band method that protects the identifier and
password from inadvertent disclosure.
In addition to the standard EPP command elements, the <login> command
contains the following child elements:
- A <clID> element that contains the client identifier assigned to
the client by the server.
- A <pw> element that contains the client's plain text password.
The value of this element is case sensitive.
- An OPTIONAL <newPW> element that contains a new plain text
password to be assigned to the client for use with subsequent
<login> commands. The value of this element is case sensitive.
- An <options> element that contains the following child elements:
- A <version> element that contains the protocol version to be
used for the command or ongoing server session.
- A <lang> element that contains the text response language to be
used for the command or ongoing server session commands.
The values of the <version> and <lang> elements MUST exactly match
one of the values presented in the EPP greeting.
- A <svcs> element that contains one or more <objURI> elements that
contain namespace URIs representing the objects to be managed
during the session. The <svcs> element MAY contain an OPTIONAL
<svcExtension> element that contains one or more <extURI> elements
that identify object extensions to be used during the session.
The PLAIN Simple Authentication and Security Layer (SASL) mechanism
presented in [RFC4616] describes a format for providing a user
identifier, an authorization identifier, and a password as part of a
single plain-text string. The EPP authentication mechanism is
similar, though EPP does not require a session-level authorization
identifier and the user identifier and password are separated into
distinct XML elements. Additional identification and authorization
schemes MUST be provided at other protocol layers to provide more
robust security services.
Example <login> command:
C:<?xml version="1.0" encoding="UTF-8" standalone="no"?>
C:<epp xmlns="urn:ietf:params:xml:ns:epp-1.0">
C: <command>
C: <login>
C: <clID>ClientX</clID>
C: <pw>foo-BAR2</pw>
C: <newPW>bar-FOO2</newPW>
C: <options>
C: <version>1.0</version>
C: <lang>en</lang>
C: </options>
C: <svcs>
C: <objURI>urn:ietf:params:xml:ns:obj1</objURI>
C: <objURI>urn:ietf:params:xml:ns:obj2</objURI>
C: <objURI>urn:ietf:params:xml:ns:obj3</objURI>
C: <svcExtension>
C: <extURI>http://custom/obj1ext-1.0</extURI>
C: </svcExtension>
C: </svcs>
C: </login>
C: <clTRID>ABC-12345</clTRID>
C: </command>
C:</epp>
When a <login> command has been processed successfully, a server MUST
respond with an EPP response with no <resData> element. If
successful, the server will respond by creating and maintaining a new
session that SHOULD be terminated by a future <logout> command.
Example <login> response:
S:<?xml version="1.0" encoding="UTF-8" standalone="no"?>
S:<epp xmlns="urn:ietf:params:xml:ns:epp-1.0">
S: <response>
S: <result code="1000">
S: <msg>Command completed successfully</msg>
S: </result>
S: <trID>
S: <clTRID>ABC-12345</clTRID>
S: <svTRID>54321-XYZ</svTRID>
S: </trID>
S: </response>
S:</epp>
The EPP <login> command is used to establish a session with an EPP
server. A <login> command MUST be rejected if received within the
bounds of an existing session. This command MUST be available to all
clients.
2.9.1.2. EPP <logout> Command
The EPP <logout> command is used to end a session with an EPP server.
The <logout> command MUST be represented as an empty element with no
child elements.
A server MAY end a session due to client inactivity or excessive
client-session longevity. The parameters for determining excessive
client inactivity or session longevity are a matter of server policy
and are not specified by this protocol.
Transport mappings MUST explicitly describe any connection-oriented
processing that takes place after processing a <logout> command and
ending a session.
Example <logout> command:
C:<?xml version="1.0" encoding="UTF-8" standalone="no"?>
C:<epp xmlns="urn:ietf:params:xml:ns:epp-1.0">
C: <command>
C: <logout/>
C: <clTRID>ABC-12345</clTRID>
C: </command>
C:</epp>
When a <logout> command has been processed successfully, a server
MUST respond with an EPP response with no <resData> element. If
successful, the server MUST also end the current session.
Example <logout> response:
S:<?xml version="1.0" encoding="UTF-8" standalone="no"?>
S:<epp xmlns="urn:ietf:params:xml:ns:epp-1.0">
S: <response>
S: <result code="1500">
S: <msg>Command completed successfully; ending session</msg>
S: </result>
S: <trID>
S: <clTRID>ABC-12345</clTRID>
S: <svTRID>54321-XYZ</svTRID>
S: </trID>
S: </response>
S:</epp>
The EPP <logout> command is used to end a session with an EPP server.
A <logout> command MUST be rejected if the command has not been
preceded by a successful <login> command. This command MUST be
available to all clients.
2.9.2. Query Commands
2.9.2.1. EPP <check> Command
The EPP <check> command is used to determine if an object can be
provisioned within a repository. It provides a hint that allows a
client to anticipate the success or failure of provisioning an object
using the <create> command as object-provisioning requirements are
ultimately a matter of server policy.
The elements needed to identify an object are object-specific, so the
child elements of the <check> command are specified using the EPP
extension framework. In addition to the standard EPP command
elements, the <check> command contains the following child elements:
- An object-specific <obj:check> element that identifies the objects
to be queried. Multiple objects of the same type MAY be queried
within a single <check> command.
Example <check> command:
C:<?xml version="1.0" encoding="UTF-8" standalone="no"?>
C:<epp xmlns="urn:ietf:params:xml:ns:epp-1.0">
C: <command>
C: <check>
C: <obj:check xmlns:obj="urn:ietf:params:xml:ns:obj">
C: <obj:name>example1</obj:name>
C: <obj:name>example2</obj:name>
C: <obj:name>example3</obj:name>
C: </obj:check>
C: </check>
C: <clTRID>ABC-12346</clTRID>
C: </command>
C:</epp>
When a <check> command has been processed successfully, a server MUST
respond with an EPP <resData> element that MUST contain a child
element that identifies the object namespace. The child elements of
the <resData> element are object-specific, though the EPP <resData>
element MUST contain a child <obj:chkData> element that contains one
or more <obj:cd> (check data) elements. Each <obj:cd> element
contains the following child elements:
- An object-specific element that identifies the queried object.
This element MUST contain an "avail" attribute whose value
indicates object availability (can it be provisioned or not) at
the moment the <check> command was completed. A value of "1" or
"true" means that the object can be provisioned. A value of "0"
or "false" means that the object cannot be provisioned.
- An OPTIONAL <obj:reason> element that MAY be provided when an
object cannot be provisioned. If present, this element contains
server-specific text to help explain why the object cannot be
provisioned. This text MUST be represented in the response
language previously negotiated with the client; an OPTIONAL "lang"
attribute MAY be present to identify the language if the
negotiated value is something other than the default value of "en"
(English).
Example <check> response:
S:<?xml version="1.0" encoding="UTF-8" standalone="no"?>
S:<epp xmlns="urn:ietf:params:xml:ns:epp-1.0">
S: <response>
S: <result code="1000">
S: <msg>Command completed successfully</msg>
S: </result>
S: <resData>
S: <obj:chkData xmlns:obj="urn:ietf:params:xml:ns:obj">
S: <obj:cd>
S: <obj:name avail="1">example1</obj:name>
S: </obj:cd>
S: <obj:cd>
S: <obj:name avail="0">example2</obj:name>
S: <obj:reason>In use</obj:reason>
S: </obj:cd>
S: <obj:cd>
S: <obj:name avail="1">example3</obj:name>
S: </obj:cd>
S: </obj:chkData>
S: </resData>
S: <trID>
S: <clTRID>ABC-12346</clTRID>
S: <svTRID>54322-XYZ</svTRID>
S: </trID>
S: </response>
S:</epp>
The EPP <check> command is used to determine if an object can be
provisioned within a repository. This action MUST be open to all
authorized clients.
2.9.2.2. EPP <info> Command
The EPP <info> command is used to retrieve information associated
with an existing object. The elements needed to identify an object
and the type of information associated with an object are both
object-specific, so the child elements of the <info> command are
specified using the EPP extension framework. In addition to the
standard EPP command elements, the <info> command contains the
following child elements:
- An object-specific <obj:info> element that identifies the object
to be queried.
Example <info> command:
C:<?xml version="1.0" encoding="UTF-8" standalone="no"?>
C:<epp xmlns="urn:ietf:params:xml:ns:epp-1.0">
C: <command>
C: <info>
C: <obj:info xmlns:obj="urn:ietf:params:xml:ns:obj">
C: <!-- Object-specific elements. -->
C: </obj:info>
C: </info>
C: <clTRID>ABC-12346</clTRID>
C: </command>
C:</epp>
When an <info> command has been processed successfully, a server MUST
respond with an EPP <resData> element that MUST contain a child
element that identifies the object namespace and the Repository
Object IDentifier (ROID) that was assigned to the object when the
object was created. Other child elements of the <resData> element
are object-specific.
Example <info> response:
S:<?xml version="1.0" encoding="UTF-8" standalone="no"?>
S:<epp xmlns="urn:ietf:params:xml:ns:epp-1.0">
S: <response>
S: <result code="1000">
S: <msg>Command completed successfully</msg>
S: </result>
S: <resData>
S: <obj:infData xmlns:obj="urn:ietf:params:xml:ns:obj">
S: <obj:roid>EXAMPLE1-REP</obj:roid>
S: <!-- Object-specific elements. -->
S: </obj:infData>
S: </resData>
S: <trID>
S: <clTRID>ABC-12346</clTRID>
S: <svTRID>54322-XYZ</svTRID>
S: </trID>
S: </response>
S:</epp>
The EPP <info> command is used to retrieve information associated
with an existing object. This action SHOULD be limited to authorized
clients; restricting this action to the sponsoring client is
RECOMMENDED.
2.9.2.3. EPP <poll> Command
The EPP <poll> command is used to discover and retrieve service
messages queued by a server for individual clients. If the message
queue is not empty, a successful response to a <poll> command MUST
return the first message from the message queue. Each response
returned from the server includes a server-unique message identifier
that MUST be provided to acknowledge receipt of the message, and a
counter that indicates the number of messages in the queue. After a
message has been received by the client, the client MUST respond to
the message with an explicit acknowledgement to confirm that the
message has been received. A server MUST dequeue the message and
decrement the queue counter after receiving acknowledgement from the
client, making the next message in the queue (if any) available for
retrieval.
Servers can occasionally perform actions on objects that are not in
direct response to a client request, or an action taken by one client
can indirectly involve a second client. Examples of such actions
include deletion upon expiration, automatic renewal upon expiration,
and transfer coordination; other types of service information MAY be
defined as a matter of server policy. Service messages SHOULD be
created for passive clients affected by an action on an object.
Service messages MAY also be created for active clients that request
an action on an object, though such messages MUST NOT replace the
normal protocol response to the request. For example, <transfer>
actions SHOULD be reported to the client that has the authority to
approve or reject a transfer request. Other methods of server-client
action notification, such as offline reporting, are also possible and
are beyond the scope of this specification.
Message queues can consume server resources if clients do not
retrieve and acknowledge messages on a regular basis. Servers MAY
implement other mechanisms to dequeue and deliver messages if queue
maintenance needs exceed server resource consumption limits. Server
operators SHOULD consider time-sensitivity and resource management
factors when selecting a delivery method for service information
because some message types can be reasonably delivered using non-
protocol methods that require fewer server resources.
Some of the information returned in response to a <poll> command can
be object-specific, so some child elements of the <poll> response MAY
be specified using the EPP extension framework. The <poll> command
MUST be represented as an empty element with no child elements. An
"op" attribute with value "req" is REQUIRED to retrieve the first
message from the server message queue. An "op" attribute (with value
"ack") and a "msgID" attribute (whose value corresponds to the value
of the "id" attribute copied from the <msg> element in the message
being acknowledged) are REQUIRED to acknowledge receipt of a message.
Example <poll> command:
C:<?xml version="1.0" encoding="UTF-8" standalone="no"?>
C:<epp xmlns="urn:ietf:params:xml:ns:epp-1.0">
C: <command>
C: <poll op="req"/>
C: <clTRID>ABC-12345</clTRID>
C: </command>
C:</epp>
The returned result code notes that a message has been dequeued and
returned in response to a <poll> command.
Example <poll> response with object-specific information:
S:<?xml version="1.0" encoding="UTF-8" standalone="no"?>
S:<epp xmlns="urn:ietf:params:xml:ns:epp-1.0">
S: <response>
S: <result code="1301">
S: <msg>Command completed successfully; ack to dequeue</msg>
S: </result>
S: <msgQ count="5" id="12345">
S: <qDate>2000-06-08T22:00:00.0Z</qDate>
S: <msg>Transfer requested.</msg>
S: </msgQ>
S: <resData>
S: <obj:trnData
S: xmlns:obj="urn:ietf:params:xml:ns:obj-1.0">
S: <obj:name>example.com</obj:name>
S: <obj:trStatus>pending</obj:trStatus>
S: <obj:reID>ClientX</obj:reID>
S: <obj:reDate>2000-06-08T22:00:00.0Z</obj:reDate>
S: <obj:acID>ClientY</obj:acID>
S: <obj:acDate>2000-06-13T22:00:00.0Z</obj:acDate>
S: <obj:exDate>2002-09-08T22:00:00.0Z</obj:exDate>
S: </obj:trnData>
S: </resData>
S: <trID>
S: <clTRID>ABC-12345</clTRID>
S: <svTRID>54321-XYZ</svTRID>
S: </trID>
S: </response>
S:</epp>
A client MUST acknowledge each response to dequeue the message and
make subsequent messages available for retrieval.
Example <poll> acknowledgement command:
C:<?xml version="1.0" encoding="UTF-8" standalone="no"?>
C:<epp xmlns="urn:ietf:params:xml:ns:epp-1.0">
C: <command>
C: <poll op="ack" msgID="12345"/>
C: <clTRID>ABC-12346</clTRID>
C: </command>
C:</epp>
A <poll> acknowledgement response notes the ID of the message that
has been acknowledged and the number of messages remaining in the
queue.
Example <poll> acknowledgement response:
S:<?xml version="1.0" encoding="UTF-8" standalone="no"?>
S:<epp xmlns="urn:ietf:params:xml:ns:epp-1.0">
S: <response>
S: <result code="1000">
S: <msg>Command completed successfully</msg>
S: </result>
S: <msgQ count="4" id="12345"/>
S: <trID>
S: <clTRID>ABC-12346</clTRID>
S: <svTRID>54322-XYZ</svTRID>
S: </trID>
S: </response>
S:</epp>
Service messages can also be returned without object information.
Example <poll> response with mixed message content and without
object-specific information:
S:<?xml version="1.0" encoding="UTF-8" standalone="no"?>
S:<epp xmlns="urn:ietf:params:xml:ns:epp-1.0">
S: <response>
S: <result code="1301">
S: <msg>Command completed successfully; ack to dequeue</msg>
S: </result>
S: <msgQ count="4" id="12346">
S: <qDate>2000-06-08T22:10:00.0Z</qDate>
S: <msg lang="en">Credit balance low.
S: <limit>100</limit><bal>5</bal>
S: </msg>
S: </msgQ>
S: <trID>
S: <clTRID>ABC-12346</clTRID>
S: <svTRID>54321-XYZ</svTRID>
S: </trID>
S: </response>
S:</epp>
The returned result code and message is used to note an empty server
message queue.
Example <poll> response to note an empty message queue:
S:<?xml version="1.0" encoding="UTF-8" standalone="no"?>
S:<epp xmlns="urn:ietf:params:xml:ns:epp-1.0">
S: <response>
S: <result code="1300">
S: <msg>Command completed successfully; no messages</msg>
S: </result>
S: <trID>
S: <clTRID>ABC-12346</clTRID>
S: <svTRID>54321-XYZ</svTRID>
S: </trID>
S: </response>
S:</epp>
The EPP <poll> command is used to discover and retrieve client
service messages from a server. This action SHOULD be limited to
authorized clients; queuing service messages and limiting queue
access on a per-client basis is RECOMMENDED.
2.9.2.4. EPP <transfer> Query Command
The EPP <transfer> command provides a query operation that allows a
client to determine real-time status of pending and completed
transfer requests. The elements needed to identify an object that is
the subject of a transfer request are object-specific, so the child
elements of the <transfer> query command are specified using the EPP
extension framework. In addition to the standard EPP command
elements, the <transfer> command contains an "op" attribute with
value "query" and the following child elements:
- An object-specific <obj:transfer> element that identifies the
object whose transfer status is requested.
Transfer status is typically considered sensitive information by the
clients involved in the operation. Object mappings MUST provide
features to restrict transfer queries to authorized clients, such as
by requiring authorization information as part of the request.
Example <transfer> query command:
C:<?xml version="1.0" encoding="UTF-8" standalone="no"?>
C:<epp xmlns="urn:ietf:params:xml:ns:epp-1.0">
C: <command>
C: <transfer op="query">
C: <obj:transfer xmlns:obj="urn:ietf:params:xml:ns:obj">
C: <!-- Object-specific elements. -->
C: </obj:transfer>
C: </transfer>
C: <clTRID>ABC-12346</clTRID>
C: </command>
C:</epp>
When a <transfer> query command has been processed successfully, a
server MUST respond with an EPP <resData> element that MUST contain a
child element that identifies the object namespace. The child
elements of the <resData> element are object-specific, but they MUST
include elements that identify the object, the status of the
transfer, the identifier of the client that requested the transfer,
the date and time that the request was made, the identifier of the
client that is authorized to act on the request, the date and time by
which an action is expected, and an OPTIONAL date and time noting
changes in the object's validity period (if applicable) that occur as
a result of the transfer.
Example <transfer> query response:
S:<?xml version="1.0" encoding="UTF-8" standalone="no"?>
S:<epp xmlns="urn:ietf:params:xml:ns:epp-1.0">
S: <response>
S: <result code="1000">
S: <msg>Command completed successfully</msg>
S: </result>
S: <resData>
S: <obj:trnData xmlns:obj="urn:ietf:params:xml:ns:obj">
S: <obj:name>example</obj:name>
S: <obj:trStatus>pending</obj:trStatus>
S: <obj:reID>ClientX</obj:reID>
S: <obj:reDate>2000-06-08T22:00:00.0Z</obj:reDate>
S: <obj:acID>ClientY</obj:acID>
S: <obj:acDate>2000-06-13T22:00:00.0Z</obj:acDate>
S: <obj:exDate>2002-09-08T22:00:00.0Z</obj:exDate>
S: </obj:trnData>
S: </resData>
S: <trID>
S: <clTRID>ABC-12346</clTRID>
S: <svTRID>54322-XYZ</svTRID>
S: </trID>
S: </response>
S:</epp>
The EPP <transfer> command provides a query operation that allows a
client to determine real-time status of pending and completed
transfer requests. This action SHOULD be limited to authorized
clients; restricting queries to the requesting and responding clients
is RECOMMENDED. Object transfer MAY be unavailable or limited by
object-specific policies.
2.9.3. Object Transform Commands
EPP provides five commands to transform objects: <create> to create
an instance of an object with a server, <delete> to remove an
instance of an object from a server, <renew> to extend the validity
period of an object, <transfer> to manage changes in client
sponsorship of an object, and <update> to change information
associated with an object.
2.9.3.1. EPP <create> Command
The EPP <create> command is used to create an instance of an object.
An object can be created for an indefinite period of time, or an
object can be created for a specific validity period. The EPP
mapping for an object MUST describe the status of an object with
respect to time in order to include expected client and server
behavior if a validity period is used.
The elements needed to identify an object and associated attributes
are object-specific, so the child elements of the <create> command
are specified using the EPP extension framework. In addition to the
standard EPP command elements, the <create> command contains the
following child elements:
- An object-specific <obj:create> element that identifies the object
to be created and the elements that are required to create the
object.
Example <create> command:
C:<?xml version="1.0" encoding="UTF-8" standalone="no"?>
C:<epp xmlns="urn:ietf:params:xml:ns:epp-1.0">
C: <command>
C: <create>
C: <obj:create xmlns:obj="urn:ietf:params:xml:ns:obj">
C: <!-- Object-specific elements. -->
C: </obj:create>
C: </create>
C: <clTRID>ABC-12345</clTRID>
C: </command>
C:</epp>
When a <create> command has been processed successfully, a server MAY
respond with an EPP <resData> element that MUST contain a child
element that identifies the object namespace. The child elements of
the <resData> element are object-specific.
Example <create> response with <resData>:
S:<?xml version="1.0" encoding="UTF-8" standalone="no"?>
S:<epp xmlns="urn:ietf:params:xml:ns:epp-1.0">
S: <response>
S: <result code="1000">
S: <msg>Command completed successfully</msg>
S: </result>
S: <resData>
S: <obj:creData xmlns:obj="urn:ietf:params:xml:ns:obj">
S: <!-- Object-specific elements. -->
S: </obj:creData>
S: </resData>
S: <trID>
S: <clTRID>ABC-12345</clTRID>
S: <svTRID>54321-XYZ</svTRID>
S: </trID>
S: </response>
S:</epp>
The EPP <create> command is used to create an instance of an object.
This action SHOULD be limited to authorized clients and MAY be
restricted on a per-client basis.
2.9.3.2. EPP <delete> Command
The EPP <delete> command is used to remove an instance of an existing
object. The elements needed to identify an object are object-
specific, so the child elements of the <delete> command are specified
using the EPP extension framework. In addition to the standard EPP
command elements, the <delete> command contains the following child
elements:
- An object-specific <obj:delete> element that identifies the object
to be deleted.
Example <delete> command:
C:<?xml version="1.0" encoding="UTF-8" standalone="no"?>
C:<epp xmlns="urn:ietf:params:xml:ns:epp-1.0">
C: <command>
C: <delete>
C: <obj:delete xmlns:obj="urn:ietf:params:xml:ns:obj">
C: <!-- Object-specific elements. -->
C: </obj:delete>
C: </delete>
C: <clTRID>ABC-12346</clTRID>
C: </command>
C:</epp>
When a <delete> command has been processed successfully, a server MAY
respond with an EPP <resData> element that MUST contain a child
element that identifies the object namespace. The child elements of
the <resData> element are object-specific.
Example <delete> response without <resData>:
S:<?xml version="1.0" encoding="UTF-8" standalone="no"?>
S:<epp xmlns="urn:ietf:params:xml:ns:epp-1.0">
S: <response>
S: <result code="1000">
S: <msg>Command completed successfully</msg>
S: </result>
S: <trID>
S: <clTRID>ABC-12346</clTRID>
S: <svTRID>54322-XYZ</svTRID>
S: </trID>
S: </response>
S:</epp>
The EPP <delete> command is used to remove an instance of an existing
object. This action SHOULD be limited to authorized clients;
restricting this action to the sponsoring client is RECOMMENDED.
2.9.3.3. EPP <renew> Command
The EPP <renew> command is used to extend the validity period of an
existing object. The elements needed to identify and extend the
validity period of an object are object-specific, so the child
elements of the <renew> command are specified using the EPP extension
framework. In addition to the standard EPP command elements, the
<renew> command contains the following child elements:
- An object-specific <obj:renew> element that identifies the object
to be renewed and the elements that are required to extend the
validity period of the object.
Example <renew> command:
C:<?xml version="1.0" encoding="UTF-8" standalone="no"?>
C:<epp xmlns="urn:ietf:params:xml:ns:epp-1.0">
C: <command>
C: <renew>
C: <obj:renew xmlns:obj="urn:ietf:params:xml:ns:obj">
C: <!-- Object-specific elements. -->
C: </obj:renew>
C: </renew>
C: <clTRID>ABC-12346</clTRID>
C: </command>
C:</epp>
When a <renew> command has been processed successfully, a server MAY
respond with an EPP <resData> element that MUST contain a child
element that identifies the object namespace. The child elements of
the <resData> element are object-specific.
Example <renew> response with <resData>:
S:<?xml version="1.0" encoding="UTF-8" standalone="no"?>
S:<epp xmlns="urn:ietf:params:xml:ns:epp-1.0">
S: <response>
S: <result code="1000">
S: <msg>Command completed successfully</msg>
S: </result>
S: <resData>
S: <obj:renData xmlns:obj="urn:ietf:params:xml:ns:obj">
S: <!-- Object-specific elements. -->
S: </obj:renData>
S: </resData>
S: <trID>
S: <clTRID>ABC-12346</clTRID>
S: <svTRID>54322-XYZ</svTRID>
S: </trID>
S: </response>
S:</epp>
The EPP <renew> command is used to extend the validity period of an
existing object. This action SHOULD be limited to authorized
clients; restricting this action to the sponsoring client is
RECOMMENDED. Object renewal MAY be unavailable or limited by object-
specific policies.
2.9.3.4. EPP <transfer> Command
The EPP <transfer> command is used to manage changes in client
sponsorship of an existing object. Clients can initiate a transfer
request, cancel a transfer request, approve a transfer request, and
reject a transfer request using the "op" command attribute.
A client who wishes to assume sponsorship of a known object from
another client uses the <transfer> command with the value of the "op"
attribute set to "request". Once a transfer has been requested, the
same client can cancel the request using a <transfer> command with
the value of the "op" attribute set to "cancel". A request to cancel
the transfer MUST be sent to the server before the current sponsoring
client either approves or rejects the transfer request and before the
server automatically processes the request due to responding client
inactivity.
Once a transfer request has been received by the server, the server
MUST notify the current sponsoring client of the requested transfer
either by queuing a service message for retrieval via the <poll>
command or by using an out-of-band mechanism to inform the client of
the request. The current status of a pending <transfer> command for
any object can be found using the <transfer> query command. Transfer
service messages MUST include the object-specific elements specified
for <transfer> command responses.
The current sponsoring client MAY explicitly approve or reject the
transfer request. The client can approve the request using a
<transfer> command with the value of the "op" attribute set to
"approve". The client can reject the request using a <transfer>
command with the value of the "op" attribute set to "reject".
A server MAY automatically approve or reject all transfer requests
that are not explicitly approved or rejected by the current
sponsoring client within a fixed amount of time. The amount of time
to wait for explicit action and the default server behavior are local
matters not specified by EPP, but they SHOULD be documented in a
server-specific profile document that describes default server
behavior for client information.
Objects eligible for transfer MUST have associated authorization
information that MUST be provided to complete a <transfer> command.
The type of authorization information required is object-specific;
passwords or more complex mechanisms based on public key cryptography
are typical.
The elements needed to identify and complete the transfer of an
object are object-specific, so the child elements of the <transfer>
command are specified using the EPP extension framework. In addition
to the standard EPP command elements, the <transfer> command contains
the following child elements:
- An object-specific <obj:transfer> element that identifies the
object to be transferred and the elements that are required to
process the transfer command.
Example <transfer> command:
C:<?xml version="1.0" encoding="UTF-8" standalone="no"?>
C:<epp xmlns="urn:ietf:params:xml:ns:epp-1.0">
C: <command>
C: <transfer op="request">
C: <obj:transfer xmlns:obj="urn:ietf:params:xml:ns:obj">
C: <!-- Object-specific elements. -->
C: </obj:transfer>
C: </transfer>
C: <clTRID>ABC-12346</clTRID>
C: </command>
C:</epp>
When a <transfer> command has been processed successfully, a server
MUST respond with an EPP <resData> element that MUST contain a child
element that identifies the object namespace. The child elements of
the <resData> element are object-specific, but they MUST include
elements that identify the object, the status of the transfer, the
identifier of the client that requested the transfer, the date and
time that the request was made, the identifier of the client that is
authorized to act on the request, the date and time by which an
action is expected, and an OPTIONAL date and time noting changes in
the object's validity period (if applicable) that occur as a result
of the transfer.
Example <transfer> response with <resData>:
S:<?xml version="1.0" encoding="UTF-8" standalone="no"?>
S:<epp xmlns="urn:ietf:params:xml:ns:epp-1.0">
S: <response>
S: <result code="1001">
S: <msg>Command completed successfully; action pending</msg>
S: </result>
S: <resData>
S: <obj:trnData xmlns:obj="urn:ietf:params:xml:ns:obj">
S: <obj:name>example</obj:name>
S: <obj:trStatus>pending</obj:trStatus>
S: <obj:reID>ClientX</obj:reID>
S: <obj:reDate>2000-06-08T22:00:00.0Z</obj:reDate>
S: <obj:acID>ClientY</obj:acID>
S: <obj:acDate>2000-06-13T22:00:00.0Z</obj:acDate>
S: <obj:exDate>2002-09-08T22:00:00.0Z</obj:exDate>
S: </obj:trnData>
S: </resData>
S: <trID>
S: <clTRID>ABC-12346</clTRID>
S: <svTRID>54322-XYZ</svTRID>
S: </trID>
S: </response>
S:</epp>
The EPP <transfer> command is used to manage changes in client
sponsorship of an existing object. This action SHOULD be limited to
authorized clients; restricting <transfer> requests to a client other
than the current sponsoring client, <transfer> approval requests to
the current sponsoring client, and <transfer> cancellation requests
to the original requesting client is RECOMMENDED. Object transfer
MAY be unavailable or limited by object-specific policies.
2.9.3.5. EPP <update> Command
The EPP <update> command is used to change information associated
with an existing object. The elements needed to identify and modify
an object are object-specific, so the child elements of the <update>
command are specified using the EPP extension framework. In addition
to the standard EPP command elements, the <update> command contains
the following child elements:
- An object-specific <obj:update> element that identifies the object
to be updated and the elements that are required to modify the
object. Object-specific elements MUST identify values to be
added, values to be removed, or values to be changed.
Example <update> command:
C:<?xml version="1.0" encoding="UTF-8" standalone="no"?>
C:<epp xmlns="urn:ietf:params:xml:ns:epp-1.0">
C: <command>
C: <update>
C: <obj:update xmlns:obj="urn:ietf:params:xml:ns:obj">
C: <!-- Object-specific elements. -->
C: </obj:update>
C: </update>
C: <clTRID>ABC-12346</clTRID>
C: </command>
C:</epp>
When an <update> command has been processed successfully, a server
MAY respond with an EPP <resData> element that MUST contain a child
element that identifies the object namespace. The child elements of
the <resData> element are object-specific.
Example <update> response without <resData>:
S:<?xml version="1.0" encoding="UTF-8" standalone="no"?>
S:<epp xmlns="urn:ietf:params:xml:ns:epp-1.0">
S: <response>
S: <result code="1000">
S: <msg>Command completed successfully</msg>
S: </result>
S: <trID>
S: <clTRID>ABC-12346</clTRID>
S: <svTRID>54322-XYZ</svTRID>
S: </trID>
S: </response>
S:</epp>
The EPP <update> command is used to change information associated
with an existing object. This action SHOULD be limited to authorized
clients; restricting this action to the sponsoring client is
RECOMMENDED.
3. Result Codes
EPP result codes are based on the theory of reply codes described in
section 4.2.1 of [RFC5321]. EPP uses four decimal digits to describe
the success or failure of each EPP command. Each of the digits of
the reply have special significance.
The first digit denotes command success or failure. The second digit
denotes the response category, such as command syntax or security.
The third and fourth digits provide explicit response detail within
each response category.
There are two values for the first digit of the reply code:
1yzz Positive completion reply. The command was accepted and
processed by the system without error.
2yzz Negative completion reply. The command was not accepted, and
the requested action did not occur.
The second digit groups responses into one of six specific
categories:
x0zz Protocol Syntax
x1zz Implementation-specific Rules
x2zz Security
x3zz Data Management
x4zz Server System
x5zz Connection Management
The third and fourth digits provide response detail within the
categories defined by the first and second digits. The complete list
of valid result codes is enumerated below and in the normative
schema.
Every EPP response MUST include a result code and a human-readable
description of the result code. The language used to represent the
description MAY be identified using an instance of the "lang"
attribute within the <msg> element. If not specified, the default
language is English, identified as "en". A description of the
structure of valid values for the "lang" attribute is described in
[RFC4646].
Response text MAY be translated into other languages, though the
translation MUST preserve the meaning of the code as described here.
Response code values MUST NOT be changed when translating text.
Response text in the table below is enclosed in quotes to clearly
mark the beginning and ending of each response string. Quotes MUST
NOT be used to delimit these strings when returning response text via
the protocol.
Successful command completion responses:
Code Response text in English
____ ________________________
1000 "Command completed successfully"
This is the usual response code for a successfully
completed command that is not addressed by any other
1xxx-series response code.
1001 "Command completed successfully; action pending"
This response code MUST be returned when responding to a
command that requires offline activity before the
requested action can be completed. See Section 2 for a
description of other processing requirements.
1300 "Command completed successfully; no messages"
This response code MUST be returned when responding to a
<poll> request command and the server message queue is
empty.
1301 "Command completed successfully; ack to dequeue"
This response code MUST be returned when responding to a
<poll> request command and a message has been retrieved
from the server message queue.
1500 "Command completed successfully; ending session"
This response code MUST be returned when responding to a
successful <logout> command.
Command error responses:
Code Response text in English
____ ________________________
2000 "Unknown command"
This response code MUST be returned when a server receives
a command element that is not defined by EPP.
2001 "Command syntax error"
This response code MUST be returned when a server receives
an improperly formed command element.
2002 "Command use error"
This response code MUST be returned when a server receives
a properly formed command element but the command cannot
be executed due to a sequencing or context error. For
example, a <logout> command cannot be executed without
having first completed a <login> command.
2003 "Required parameter missing"
This response code MUST be returned when a server receives
a command for which a required parameter value has not
been provided.
2004 "Parameter value range error"
This response code MUST be returned when a server receives
a command parameter whose value is outside the range of
values specified by the protocol. The error value SHOULD
be returned via a <value> element in the EPP response.
2005 "Parameter value syntax error"
This response code MUST be returned when a server receives
a command containing a parameter whose value is improperly
formed. The error value SHOULD be returned via a <value>
element in the EPP response.
2100 "Unimplemented protocol version"
This response code MUST be returned when a server receives
a command element specifying a protocol version that is
not implemented by the server.
2101 "Unimplemented command"
This response code MUST be returned when a server receives
a valid EPP command element that is not implemented by the
server. For example, a <transfer> command can be
unimplemented for certain object types.
2102 "Unimplemented option"
This response code MUST be returned when a server receives
a valid EPP command element that contains a protocol
option that is not implemented by the server.
2103 "Unimplemented extension"
This response code MUST be returned when a server receives
a valid EPP command element that contains a protocol
command extension that is not implemented by the server.
2104 "Billing failure"
This response code MUST be returned when a server attempts
to execute a billable operation and the command cannot be
completed due to a client-billing failure.
2105 "Object is not eligible for renewal"
This response code MUST be returned when a client attempts
to <renew> an object that is not eligible for renewal in
accordance with server policy.
2106 "Object is not eligible for transfer"
This response code MUST be returned when a client attempts
to <transfer> an object that is not eligible for transfer
in accordance with server policy.
2200 "Authentication error"
This response code MUST be returned when a server notes an
error when validating client credentials.
2201 "Authorization error"
This response code MUST be returned when a server notes a
client-authorization error when executing a command. This
error is used to note that a client lacks privileges to
execute the requested command.
2202 "Invalid authorization information"
This response code MUST be returned when a server receives
invalid command authorization information when attempting
to confirm authorization to execute a command. This error
is used to note that a client has the privileges required
to execute the requested command, but the authorization
information provided by the client does not match the
authorization information archived by the server.
2300 "Object pending transfer"
This response code MUST be returned when a server receives
a command to transfer of an object that is pending
transfer due to an earlier transfer request.
2301 "Object not pending transfer"
This response code MUST be returned when a server receives
a command to confirm, reject, or cancel the transfer of an
object when no command has been made to transfer the
object.
2302 "Object exists"
This response code MUST be returned when a server receives
a command to create an object that already exists in the
repository.
2303 "Object does not exist"
This response code MUST be returned when a server receives
a command to query or transform an object that does not
exist in the repository.
2304 "Object status prohibits operation"
This response code MUST be returned when a server receives
a command to transform an object that cannot be completed
due to server policy or business practices. For example,
a server can disallow <transfer> commands under terms and
conditions that are matters of local policy, or the server
might have received a <delete> command for an object whose
status prohibits deletion.
2305 "Object association prohibits operation"
This response code MUST be returned when a server receives
a command to transform an object that cannot be completed
due to dependencies on other objects that are associated
with the target object. For example, a server can
disallow <delete> commands while an object has active
associations with other objects.
2306 "Parameter value policy error"
This response code MUST be returned when a server receives
a command containing a parameter value that is
syntactically valid but semantically invalid due to local
policy. For example, the server can support a subset of a
range of valid protocol parameter values. The error value
SHOULD be returned via a <value> element in the EPP
response.
2307 "Unimplemented object service"
This response code MUST be returned when a server receives
a command to operate on an object service that is not
supported by the server.
2308 "Data management policy violation"
This response code MUST be returned when a server receives
a command whose execution results in a violation of server
data management policies. For example, removing all
attribute values or object associations from an object
might be a violation of a server's data management
policies.
2400 "Command failed"
This response code MUST be returned when a server is
unable to execute a command due to an internal server
error that is not related to the protocol. The failure
can be transient. The server MUST keep any ongoing
session active.
2500 "Command failed; server closing connection"
This response code MUST be returned when a server receives
a command that cannot be completed due to an internal
server error that is not related to the protocol. The
failure is not transient and will cause other commands to
fail as well. The server MUST end the active session and
close the existing connection.
2501 "Authentication error; server closing connection"
This response code MUST be returned when a server notes an
error when validating client credentials and a
server-defined limit on the number of allowable failures
has been exceeded. The server MUST close the existing
connection.
2502 "Session limit exceeded; server closing connection"
This response code MUST be returned when a server receives
a <login> command and the command cannot be completed
because the client has exceeded a system-defined limit on
the number of sessions that the client can establish. It
might be possible to establish a session by ending
existing unused sessions and closing inactive connections.
4. Formal Syntax
EPP is specified in XML Schema notation. The formal syntax presented
here is a complete schema representation of EPP suitable for
automated validation of EPP XML instances.
Two schemas are presented here. The first schema is the base EPP
schema. The second schema defines elements and structures that can
be used by both the base EPP schema and object mapping schema. The
BEGIN and END tags are not part of the schema; they are used to note
the beginning and ending of the schema for URI registration purposes.
4.1. Base Schema
Copyright (c) 2009 IETF Trust and the persons identified as authors
of the code. All rights reserved.
Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions
are met:
o Redistributions of source code must retain the above copyright
notice, this list of conditions and the following disclaimer.
o Redistributions in binary form must reproduce the above copyright
notice, this list of conditions and the following disclaimer in
the documentation and/or other materials provided with the
distribution.
o Neither the name of Internet Society, IETF or IETF Trust, nor the
names of specific contributors, may be used to endorse or promote
products derived from this software without specific prior written
permission.
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
BEGIN
<?xml version="1.0" encoding="UTF-8"?>
<schema targetNamespace="urn:ietf:params:xml:ns:epp-1.0"
xmlns:epp="urn:ietf:params:xml:ns:epp-1.0"
xmlns:eppcom="urn:ietf:params:xml:ns:eppcom-1.0"
xmlns="http://www.w3.org/2001/XMLSchema"
elementFormDefault="qualified">
<!--
Import common element types.
-->
<import namespace="urn:ietf:params:xml:ns:eppcom-1.0"/>
<annotation>
<documentation>
Extensible Provisioning Protocol v1.0 schema.
</documentation>
</annotation>
<!--
Every EPP XML instance must begin with this element.
-->
<element name="epp" type="epp:eppType"/>
<!--
An EPP XML instance must contain a greeting, hello, command,
response, or extension.
-->
<complexType name="eppType">
<choice>
<element name="greeting" type="epp:greetingType"/>
<element name="hello"/>
<element name="command" type="epp:commandType"/>
<element name="response" type="epp:responseType"/>
<element name="extension" type="epp:extAnyType"/>
</choice>
</complexType>
<!--
A greeting is sent by a server in response to a client connection
or <hello>.
-->
<complexType name="greetingType">
<sequence>
<element name="svID" type="epp:sIDType"/>
<element name="svDate" type="dateTime"/>
<element name="svcMenu" type="epp:svcMenuType"/>
<element name="dcp" type="epp:dcpType"/>
</sequence>
</complexType>
<!--
Server IDs are strings with minimum and maximum length restrictions.
-->
<simpleType name="sIDType">
<restriction base="normalizedString">
<minLength value="3"/>
<maxLength value="64"/>
</restriction>
</simpleType>
<!--
A server greeting identifies available object services.
-->
<complexType name="svcMenuType">
<sequence>
<element name="version" type="epp:versionType"
maxOccurs="unbounded"/>
<element name="lang" type="language"
maxOccurs="unbounded"/>
<element name="objURI" type="anyURI"
maxOccurs="unbounded"/>
<element name="svcExtension" type="epp:extURIType"
minOccurs="0"/>
</sequence>
</complexType>
<!--
Data Collection Policy types.
-->
<complexType name="dcpType">
<sequence>
<element name="access" type="epp:dcpAccessType"/>
<element name="statement" type="epp:dcpStatementType"
maxOccurs="unbounded"/>
<element name="expiry" type="epp:dcpExpiryType"
minOccurs="0"/>
</sequence>
</complexType>
<complexType name="dcpAccessType">
<choice>
<element name="all"/>
<element name="none"/>
<element name="null"/>
<element name="other"/>
<element name="personal"/>
<element name="personalAndOther"/>
</choice>
</complexType>
<complexType name="dcpStatementType">
<sequence>
<element name="purpose" type="epp:dcpPurposeType"/>
<element name="recipient" type="epp:dcpRecipientType"/>
<element name="retention" type="epp:dcpRetentionType"/>
</sequence>
</complexType>
<complexType name="dcpPurposeType">
<sequence>
<element name="admin"
minOccurs="0"/>
<element name="contact"
minOccurs="0"/>
<element name="other"
minOccurs="0"/>
<element name="prov"
minOccurs="0"/>
</sequence>
</complexType>
<complexType name="dcpRecipientType">
<sequence>
<element name="other"
minOccurs="0"/>
<element name="ours" type="epp:dcpOursType"
minOccurs="0" maxOccurs="unbounded"/>
<element name="public"
minOccurs="0"/>
<element name="same"
minOccurs="0"/>
<element name="unrelated"
minOccurs="0"/>
</sequence>
</complexType>
<complexType name="dcpOursType">
<sequence>
<element name="recDesc" type="epp:dcpRecDescType"
minOccurs="0"/>
</sequence>
</complexType>
<simpleType name="dcpRecDescType">
<restriction base="token">
<minLength value="1"/>
<maxLength value="255"/>
</restriction>
</simpleType>
<complexType name="dcpRetentionType">
<choice>
<element name="business"/>
<element name="indefinite"/>
<element name="legal"/>
<element name="none"/>
<element name="stated"/>
</choice>
</complexType>
<complexType name="dcpExpiryType">
<choice>
<element name="absolute" type="dateTime"/>
<element name="relative" type="duration"/>
</choice>
</complexType>
<!--
Extension framework types.
-->
<complexType name="extAnyType">
<sequence>
<any namespace="##other"
maxOccurs="unbounded"/>
</sequence>
</complexType>
<complexType name="extURIType">
<sequence>
<element name="extURI" type="anyURI"
maxOccurs="unbounded"/>
</sequence>
</complexType>
<!--
An EPP version number is a dotted pair of decimal numbers.
-->
<simpleType name="versionType">
<restriction base="token">
<pattern value="[1-9]+\.[0-9]+"/>
<enumeration value="1.0"/>
</restriction>
</simpleType>
<!--
Command types.
-->
<complexType name="commandType">
<sequence>
<choice>
<element name="check" type="epp:readWriteType"/>
<element name="create" type="epp:readWriteType"/>
<element name="delete" type="epp:readWriteType"/>
<element name="info" type="epp:readWriteType"/>
<element name="login" type="epp:loginType"/>
<element name="logout"/>
<element name="poll" type="epp:pollType"/>
<element name="renew" type="epp:readWriteType"/>
<element name="transfer" type="epp:transferType"/>
<element name="update" type="epp:readWriteType"/>
</choice>
<element name="extension" type="epp:extAnyType"
minOccurs="0"/>
<element name="clTRID" type="epp:trIDStringType"
minOccurs="0"/>
</sequence>
</complexType>
<!--
The <login> command.
-->
<complexType name="loginType">
<sequence>
<element name="clID" type="eppcom:clIDType"/>
<element name="pw" type="epp:pwType"/>
<element name="newPW" type="epp:pwType"
minOccurs="0"/>
<element name="options" type="epp:credsOptionsType"/>
<element name="svcs" type="epp:loginSvcType"/>
</sequence>
</complexType>
<complexType name="credsOptionsType">
<sequence>
<element name="version" type="epp:versionType"/>
<element name="lang" type="language"/>
</sequence>
</complexType>
<simpleType name="pwType">
<restriction base="token">
<minLength value="6"/>
<maxLength value="16"/>
</restriction>
</simpleType>
<complexType name="loginSvcType">
<sequence>
<element name="objURI" type="anyURI"
maxOccurs="unbounded"/>
<element name="svcExtension" type="epp:extURIType"
minOccurs="0"/>
</sequence>
</complexType>
<!--
The <poll> command.
-->
<complexType name="pollType">
<attribute name="op" type="epp:pollOpType"
use="required"/>
<attribute name="msgID" type="token"/>
</complexType>
<simpleType name="pollOpType">
<restriction base="token">
<enumeration value="ack"/>
<enumeration value="req"/>
</restriction>
</simpleType>
<!--
The <transfer> command. This is object-specific, and uses attributes
to identify the requested operation.
-->
<complexType name="transferType">
<sequence>
<any namespace="##other"/>
</sequence>
<attribute name="op" type="epp:transferOpType"
use="required"/>
</complexType>
<simpleType name="transferOpType">
<restriction base="token">
<enumeration value="approve"/>
<enumeration value="cancel"/>
<enumeration value="query"/>
<enumeration value="reject"/>
<enumeration value="request"/>
</restriction>
</simpleType>
<!--
All other object-centric commands. EPP doesn't specify the syntax or
semantics of object-centric command elements. The elements MUST be
described in detail in another schema specific to the object.
-->
<complexType name="readWriteType">
<sequence>
<any namespace="##other"/>
</sequence>
</complexType>
<complexType name="trIDType">
<sequence>
<element name="clTRID" type="epp:trIDStringType"
minOccurs="0"/>
<element name="svTRID" type="epp:trIDStringType"/>
</sequence>
</complexType>
<simpleType name="trIDStringType">
<restriction base="token">
<minLength value="3"/>
<maxLength value="64"/>
</restriction>
</simpleType>
<!--
Response types.
-->
<complexType name="responseType">
<sequence>
<element name="result" type="epp:resultType"
maxOccurs="unbounded"/>
<element name="msgQ" type="epp:msgQType"
minOccurs="0"/>
<element name="resData" type="epp:extAnyType"
minOccurs="0"/>
<element name="extension" type="epp:extAnyType"
minOccurs="0"/>
<element name="trID" type="epp:trIDType"/>
</sequence>
</complexType>
<complexType name="resultType">
<sequence>
<element name="msg" type="epp:msgType"/>
<choice minOccurs="0" maxOccurs="unbounded">
<element name="value" type="epp:errValueType"/>
<element name="extValue" type="epp:extErrValueType"/>
</choice>
</sequence>
<attribute name="code" type="epp:resultCodeType"
use="required"/>
</complexType>
<complexType name="errValueType" mixed="true">
<sequence>
<any namespace="##any" processContents="skip"/>
</sequence>
<anyAttribute namespace="##any" processContents="skip"/>
</complexType>
<complexType name="extErrValueType">
<sequence>
<element name="value" type="epp:errValueType"/>
<element name="reason" type="epp:msgType"/>
</sequence>
</complexType>
<complexType name="msgQType">
<sequence>
<element name="qDate" type="dateTime"
minOccurs="0"/>
<element name="msg" type="epp:mixedMsgType"
minOccurs="0"/>
</sequence>
<attribute name="count" type="unsignedLong"
use="required"/>
<attribute name="id" type="eppcom:minTokenType"
use="required"/>
</complexType>
<complexType name="mixedMsgType" mixed="true">
<sequence>
<any processContents="skip"
minOccurs="0" maxOccurs="unbounded"/>
</sequence>
<attribute name="lang" type="language"
default="en"/>
</complexType>
<!--
Human-readable text may be expressed in languages other than English.
-->
<complexType name="msgType">
<simpleContent>
<extension base="normalizedString">
<attribute name="lang" type="language"
default="en"/>
</extension>
</simpleContent>
</complexType>
<!--
EPP result codes.
-->
<simpleType name="resultCodeType">
<restriction base="unsignedShort">
<enumeration value="1000"/>
<enumeration value="1001"/>
<enumeration value="1300"/>
<enumeration value="1301"/>
<enumeration value="1500"/>
<enumeration value="2000"/>
<enumeration value="2001"/>
<enumeration value="2002"/>
<enumeration value="2003"/>
<enumeration value="2004"/>
<enumeration value="2005"/>
<enumeration value="2100"/>
<enumeration value="2101"/>
<enumeration value="2102"/>
<enumeration value="2103"/>
<enumeration value="2104"/>
<enumeration value="2105"/>
<enumeration value="2106"/>
<enumeration value="2200"/>
<enumeration value="2201"/>
<enumeration value="2202"/>
<enumeration value="2300"/>
<enumeration value="2301"/>
<enumeration value="2302"/>
<enumeration value="2303"/>
<enumeration value="2304"/>
<enumeration value="2305"/>
<enumeration value="2306"/>
<enumeration value="2307"/>
<enumeration value="2308"/>
<enumeration value="2400"/>
<enumeration value="2500"/>
<enumeration value="2501"/>
<enumeration value="2502"/>
</restriction>
</simpleType>
<!--
End of schema.
-->
</schema>
END
4.2. Shared Structure Schema
Copyright (c) 2009 IETF Trust and the persons identified as authors
of the code. All rights reserved.
Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions
are met:
o Redistributions of source code must retain the above copyright
notice, this list of conditions and the following disclaimer.
o Redistributions in binary form must reproduce the above copyright
notice, this list of conditions and the following disclaimer in
the documentation and/or other materials provided with the
distribution.
o Neither the name of Internet Society, IETF or IETF Trust, nor the
names of specific contributors, may be used to endorse or promote
products derived from this software without specific prior written
permission.
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
BEGIN
<?xml version="1.0" encoding="UTF-8"?>
<schema targetNamespace="urn:ietf:params:xml:ns:eppcom-1.0"
xmlns:eppcom="urn:ietf:params:xml:ns:eppcom-1.0"
xmlns="http://www.w3.org/2001/XMLSchema"
elementFormDefault="qualified">
<annotation>
<documentation>
Extensible Provisioning Protocol v1.0
shared structures schema.
</documentation>
</annotation>
<!--
Object authorization information types.
-->
<complexType name="pwAuthInfoType">
<simpleContent>
<extension base="normalizedString">
<attribute name="roid" type="eppcom:roidType"/>
</extension>
</simpleContent>
</complexType>
<complexType name="extAuthInfoType">
<sequence>
<any namespace="##other"/>
</sequence>
</complexType>
<!--
<check> response types.
-->
<complexType name="reasonType">
<simpleContent>
<extension base="eppcom:reasonBaseType">
<attribute name="lang" type="language"/>
</extension>
</simpleContent>
</complexType>
<simpleType name="reasonBaseType">
<restriction base="token">
<minLength value="1"/>
<maxLength value="32"/>
</restriction>
</simpleType>
<!--
Abstract client and object identifier type.
-->
<simpleType name="clIDType">
<restriction base="token">
<minLength value="3"/>
<maxLength value="16"/>
</restriction>
</simpleType>
<!--
DNS label type.
-->
<simpleType name="labelType">
<restriction base="token">
<minLength value="1"/>
<maxLength value="255"/>
</restriction>
</simpleType>
<!--
Non-empty token type.
-->
<simpleType name="minTokenType">
<restriction base="token">
<minLength value="1"/>
</restriction>
</simpleType>
<!--
Repository Object IDentifier type.
-->
<simpleType name="roidType">
<restriction base="token">
<pattern value="(\w|_){1,80}-\w{1,8}"/>
</restriction>
</simpleType>
<!--
Transfer status identifiers.
-->
<simpleType name="trStatusType">
<restriction base="token">
<enumeration value="clientApproved"/>
<enumeration value="clientCancelled"/>
<enumeration value="clientRejected"/>
<enumeration value="pending"/>
<enumeration value="serverApproved"/>
<enumeration value="serverCancelled"/>
</restriction>
</simpleType>
<!--
End of schema.
-->
</schema>
END
5. Internationalization Considerations
EPP is represented in XML, which provides native support for encoding
information using the Unicode character set and its more compact
representations including UTF-8. Conformant XML processors recognize
both UTF-8 and UTF-16. Though XML includes provisions to identify
and use other character encodings through use of an "encoding"
attribute in an <?xml?> declaration, use of UTF-8 is RECOMMENDED in
environments where parser-encoding-support incompatibility exists.
EPP includes a provision for returning a human-readable message with
every result code. This document describes result codes in English,
but the actual text returned with a result MAY be provided in a
language negotiated when a session is established. Languages other
than English MUST be noted through specification of a "lang"
attribute for each message. Valid values for the "lang" attribute
and "lang" negotiation elements are described in [RFC4646].
All date-time values presented via EPP MUST be expressed in Universal
Coordinated Time using the Gregorian calendar. XML Schema allows use
of time zone identifiers to indicate offsets from the zero meridian,
but this option MUST NOT be used with EPP. The extended date-time
form using upper case "T" and "Z" characters defined in
[W3C.REC-xmlschema-2-20041028] MUST be used to represent date-time
values, as XML Schema does not support truncated date-time forms or
lower case "T" and "Z" characters.
6. IANA Considerations
This document uses URNs to describe XML namespaces and XML schemas
conforming to a registry mechanism described in [RFC3688]. Four URI
assignments have been registered by the IANA.
Registration request for the EPP namespace:
URI: urn:ietf:params:xml:ns:epp-1.0
Registrant Contact: See the "Author's Address" section of this
document.
XML: None. Namespace URIs do not represent an XML specification.
Registration request for the EPP XML schema:
URI: urn:ietf:params:xml:schema:epp-1.0
Registrant Contact: See the "Author's Address" section of this
document.
XML: See the "Base Schema" section of this document.
Registration request for the EPP shared structure namespace:
URI: urn:ietf:params:xml:ns:eppcom-1.0
Registrant Contact: See the "Author's Address" section of this
document.
XML: None. Namespace URIs do not represent an XML specification.
Registration request for the EPP shared structure XML schema:
URI: urn:ietf:params:xml:schema:eppcom-1.0
Registrant Contact: See the "Author's Address" section of this
document.
XML: See the "Shared Structure Schema" section of this document.
A MIME media type registration template is included in Appendix B.
7. Security Considerations
EPP provides only simple client-authentication services. A passive
attack is sufficient to recover client identifiers and passwords,
allowing trivial command forgery. Protection against most common
attacks and more robust security services MUST be provided by other
protocol layers. Specifically, EPP instances MUST be protected using
a transport mechanism or application protocol that provides
integrity, confidentiality, and mutual, strong client-server
authentication.
EPP uses a variant of the PLAIN SASL mechanism described in [RFC4616]
to provide a simple application-layer authentication service that
augments or supplements authentication and identification services
that might be available at other protocol layers. Where the PLAIN
SASL mechanism specifies provision of an authorization identifier,
authentication identifier, and password as a single string separated
by ASCII NUL characters, EPP specifies use of a combined
authorization and authentication identifier and a password provided
as distinct XML elements.
Repeated password guessing attempts can be discouraged by limiting
the number of <login> attempts that can be attempted on an open
connection. A server MAY close an open connection if multiple
<login> attempts are made with either an invalid client identifier,
an invalid password, or both an invalid client identifier and an
invalid password.
EPP uses authentication information associated with objects to
confirm object-transfer authority. Authentication information
exchanged between EPP clients and third-party entities MUST be
exchanged using a facility that provides privacy and integrity
services to protect against unintended disclosure and modification
while in transit.
EPP instances SHOULD be protected using a transport mechanism or
application protocol that provides anti-replay protection. EPP
provides some protection against replay attacks through command
idempotency and client-initiated transaction identification.
Consecutive command replays will not change the state of an object in
any way. There is, however, a chance of unintended or malicious
consequence if a command is replayed after intervening commands have
changed the object state and client identifiers are not used to
detect replays. For example, a replayed <create> command that
follows a <delete> command might succeed without additional
facilities to prevent or detect the replay.
As described in Section 2, EPP includes features that allow for
offline review of transform commands before the requested action is
actually completed. The server is required to notify the client when
offline processing of the action has been completed. Notifications
can be sent using an out-of-band mechanism that is not protected by
the mechanism used to provide EPP transport security. Notifications
sent without EPP's transport-security services should be protected
using another mechanism that provides an appropriate level of
protection for the notification.
8. Acknowledgements
RFC 3730 is a product of the PROVREG working group, which suggested
improvements and provided many invaluable comments. The author
wishes to acknowledge the efforts of WG chairs Edward Lewis and Jaap
Akkerhuis for their process and editorial contributions. RFC 4930
and this document are individual submissions, based on the work done
in RFC 3730.
Specific suggestions that have been incorporated into this document
were provided by Chris Bason, Eric Brunner-Williams, Jordyn Buchanan,
Roger Castillo Cortazar, Dave Crocker, Ayesha Damaraju, Sheer
El-Showk, Patrik Faltstrom, James Gould, John Immordino, Dan Kohn,
Hong Liu, Klaus Malorny, Dan Manley, Michael Mealling, Patrick
Mevzek, Andrew Newton, Budi Rahardjo, Asbjorn Steira, Rick Wesson,
and Jay Westerdal.
9. References
9.1. Normative References
[RFC2119] Bradner, S., "Key words for use in RFCs to Indicate
Requirement Levels", BCP 14, RFC 2119, March 1997.
[RFC2277] Alvestrand, H., "IETF Policy on Character Sets and
Languages", BCP 18, RFC 2277, January 1998.
[RFC2914] Floyd, S., "Congestion Control Principles", BCP 41,
RFC 2914, September 2000.
[RFC3629] Yergeau, F., "UTF-8, a transformation format of ISO
10646", STD 63, RFC 3629, November 2003.
[RFC3688] Mealling, M., "The IETF XML Registry", BCP 81, RFC 3688,
January 2004.
[RFC4646] Phillips, A. and M. Davis, "Tags for Identifying
Languages", BCP 47, RFC 4646, September 2006.
[W3C.REC-xml-20040204]
Sperberg-McQueen, C., Maler, E., Yergeau, F., Paoli, J.,
and T. Bray, "Extensible Markup Language (XML) 1.0 (Third
Edition)", World Wide Web Consortium FirstEdition REC-xml-
20040204, February 2004,
<http://www.w3.org/TR/2004/REC-xml-20040204>.
[W3C.REC-xmlschema-1-20041028]
Maloney, M., Thompson, H., Mendelsohn, N., and D. Beech,
"XML Schema Part 1: Structures Second Edition", World Wide
Web Consortium Recommendation REC-xmlschema-1-20041028,
October 2004,
<http://www.w3.org/TR/2004/REC-xmlschema-1-20041028>.
[W3C.REC-xmlschema-2-20041028]
Malhotra, A. and P. Biron, "XML Schema Part 2: Datatypes
Second Edition", World Wide Web Consortium
Recommendation REC-xmlschema-2-20041028, October 2004,
<http://www.w3.org/TR/2004/REC-xmlschema-2-20041028>.
9.2. Informative References
[RFC0793] Postel, J., "Transmission Control Protocol", STD 7,
RFC 793, September 1981.
[RFC2781] Hoffman, P. and F. Yergeau, "UTF-16, an encoding of ISO
10646", RFC 2781, February 2000.
[RFC3023] Murata, M., St. Laurent, S., and D. Kohn, "XML Media
Types", RFC 3023, January 2001.
[RFC3080] Rose, M., "The Blocks Extensible Exchange Protocol Core",
RFC 3080, March 2001.
[RFC3375] Hollenbeck, S., "Generic Registry-Registrar Protocol
Requirements", RFC 3375, September 2002.
[RFC4616] Zeilenga, K., "The PLAIN Simple Authentication and
Security Layer (SASL) Mechanism", RFC 4616, August 2006.
[RFC4930] Hollenbeck, S., "Extensible Provisioning Protocol (EPP)",
RFC 4930, May 2007.
[RFC4960] Stewart, R., "Stream Control Transmission Protocol",
RFC 4960, September 2007.
[RFC5321] Klensin, J., "Simple Mail Transfer Protocol", RFC 5321,
October 2008.
[W3C.REC-P3P-20020416]
Marchiori, M., "The Platform for Privacy Preferences 1.0
(P3P1.0) Specification", World Wide Web Consortium
Recommendation REC-P3P-20020416, April 2002,
<http://www.w3.org/TR/2002/REC-P3P-20020416>.
Appendix A. Object Mapping Template
This appendix describes a recommended outline for documenting the EPP
mapping of an object. Documents that describe EPP object mappings
SHOULD describe the mapping in a format similar to the one used here.
Additional sections are required if the object mapping is written in
Internet-Draft or RFC format.
1. Introduction
Provide an introduction that describes the object and gives an
overview of the mapping to EPP.
2. Object Attributes
Describe the attributes associated with the object, including
references to syntax specifications as appropriate. Examples of
object attributes include a name or identifier and dates
associated with modification events.
3. EPP Command Mapping
3.1. EPP Query Commands
3.1.1. EPP <check> Command
Describe the object-specific mappings required to implement the
EPP <check> command. Include both sample commands and sample
responses.
3.1.2. EPP <info> Command
Describe the object-specific mappings required to implement the
EPP <info> command. Include both sample commands and sample
responses.
3.1.3. EPP <poll> Command
Describe the object-specific mappings required to implement the
EPP <poll> command. Include both sample commands and sample
responses.
3.1.4. EPP <transfer> Command
Describe the object-specific mappings required to implement the
EPP <transfer> query command. Include both sample commands and
sample responses.
3.2. EPP Transform Commands
3.2.1. EPP <create> Command
Describe the object-specific mappings required to implement the
EPP <create> command. Include both sample commands and sample
responses. Describe the status of the object with respect to
time, including expected client and server behavior if a validity
period is used.
3.2.2. EPP <delete> Command
Describe the object-specific mappings required to implement the
EPP <delete> command. Include both sample commands and sample
responses.
3.2.3. EPP <renew> Command
Describe the object-specific mappings required to implement the
EPP <renew> command. Include both sample commands and sample
responses.
3.2.4. EPP <transfer> Command
Describe the object-specific mappings required to implement the
EPP <transfer> command. Include both sample commands and sample
responses.
3.2.4. EPP <update> Command
Describe the object-specific mappings required to implement the
EPP <update> command. Include both sample commands and sample
responses.
4. Formal Syntax
Provide the XML schema for the object mapping. An XML DTD MUST
NOT be used, as DTDs do not provide sufficient support for XML
namespaces and strong data typing.
Appendix B. Media Type Registration: application/epp+xml
MIME media type name: application
MIME subtype name: epp+xml
Required parameters: none
Optional parameters: Same as the charset parameter of application/xml
as specified in [RFC3023].
Encoding considerations: Same as the encoding considerations of
application/xml as specified in [RFC3023].
Security considerations: This type has all of the security
considerations described in [RFC3023] plus the considerations
specified in the Security Considerations section of this document.
Interoperability considerations: XML has proven to be interoperable
across WWW Distributed Authoring and Versioning (WebDAV) clients and
servers, and for import and export from multiple XML authoring tools.
For maximum interoperability, validating processors are recommended.
Although non-validating processors can be more efficient, they are
not required to handle all features of XML. For further information,
see Section 2.9, "Standalone Document Declaration", and Section 5,
"Conformance", of [W3C.REC-xml-20040204].
Published specification: This document.
Applications that use this media type: EPP is device-, platform-, and
vendor-neutral and is supported by multiple service providers.
Additional information: If used, magic numbers, fragment identifiers,
base URIs, and use of the BOM should be as specified in [RFC3023].
Magic number(s): None.
File extension(s): .xml
Macintosh file type code(s): "TEXT"
Person & email address for further information: See the "Author's
Address" section of this document.
Intended usage: COMMON
Author/Change controller: IETF
Appendix C. Changes from RFC 4930
1. Changed "This document obsoletes RFC 3730" to "This document
obsoletes RFC 4930".
2. Replaced references to RFC 2595 with references to RFC 4616.
3. Replaced references to RFC 2821 with references to RFC 5321.
4. Replaced references to RFC 2960 with references to RFC 4960.
5. Replaced references to RFC 3066 with references to RFC 4646.
6. Replaced references to RFC 3730 with references to RFC 4930.
7. Added "A protocol client that is authorized to manage an
existing object is described as a "sponsoring" client throughout
this document" in Section 1.1.
8. Changed "This action MUST be open to all authorized clients" to
"This command MUST be available to all clients" in the
descriptions of the <login> and <logout> commands.
9. Changed "Specific result codes are listed in the table below" to
"The complete list of valid result codes is enumerated below and
in the normative schema" in Section 3.
10. Added new paragraph to Section 7 to give guidance on the need to
protect offline transaction notices.
11. Added reference to Appendix B in the IANA Considerations
section.
12. Added BSD license text to XML schema section.
Author's Address
Scott Hollenbeck
VeriSign, Inc.
21345 Ridgetop Circle
Dulles, VA 20166-6503
US
EMail: shollenbeck@verisign.com
Network Working Group S. Hollenbeck
Request for Comments: 5731 VeriSign, Inc.
STD: 69 August 2009
Obsoletes: 4931
Category: Standards Track
Extensible Provisioning Protocol (EPP) Domain Name Mapping
Abstract
This document describes an Extensible Provisioning Protocol (EPP)
mapping for the provisioning and management of Internet domain names
stored in a shared central repository. Specified in XML, the mapping
defines EPP command syntax and semantics as applied to domain names.
This document obsoletes RFC 4931.
Status of This Memo
This document specifies an Internet standards track protocol for the
Internet community, and requests discussion and suggestions for
improvements. Please refer to the current edition of the "Internet
Official Protocol Standards" (STD 1) for the standardization state
and status of this protocol. Distribution of this memo is unlimited.
Copyright Notice
Copyright (c) 2009 IETF Trust and the persons identified as the
document authors. All rights reserved.
This document is subject to BCP 78 and the IETF Trust's Legal
Provisions Relating to IETF Documents in effect on the date of
publication of this document (http://trustee.ietf.org/license-info).
Please review these documents carefully, as they describe your rights
and restrictions with respect to this document.
Table of Contents
1. Introduction ....................................................3
1.1. Relationship of Domain Objects and Host Objects ............3
1.2. Conventions Used in This Document ..........................5
2. Object Attributes ...............................................5
2.1. Domain and Host Names ......................................5
2.2. Contact and Client Identifiers .............................5
2.3. Status Values ..............................................5
2.4. Dates and Times ............................................7
2.5. Validity Periods ...........................................8
2.6. Authorization Information ..................................8
2.7. Other DNS Resource Record Attributes .......................8
3. EPP Command Mapping .............................................9
3.1. EPP Query Commands .........................................9
3.1.1. EPP <check> Command .................................9
3.1.2. EPP <info> Command .................................11
3.1.3. EPP <transfer> Query Command .......................15
3.2. EPP Transform Commands ....................................17
3.2.1. EPP <create> Command ...............................18
3.2.2. EPP <delete> Command ...............................20
3.2.3. EPP <renew> Command ................................22
3.2.4. EPP <transfer> Command .............................23
3.2.5. EPP <update> Command ...............................25
3.3. Offline Review of Requested Actions .......................28
4. Formal Syntax ..................................................30
5. Internationalization Considerations ............................40
6. IANA Considerations ............................................40
7. Security Considerations ........................................41
8. Acknowledgements ...............................................41
9. References .....................................................42
9.1. Normative References ......................................42
9.2. Informative References ....................................43
Appendix A. Changes from RFC 4931 ................................44
1. Introduction
This document describes an Internet domain name mapping for version
1.0 of the Extensible Provisioning Protocol (EPP). This mapping is
specified using the Extensible Markup Language (XML) 1.0 as described
in [W3C.REC-xml-20040204] and XML Schema notation as described in
[W3C.REC-xmlschema-1-20041028] and [W3C.REC-xmlschema-2-20041028].
This document obsoletes RFC 4931 [RFC4931].
[RFC5730] provides a complete description of EPP command and response
structures. A thorough understanding of the base protocol
specification is necessary to understand the mapping described in
this document.
XML is case sensitive. Unless stated otherwise, XML specifications
and examples provided in this document MUST be interpreted in the
character case presented to develop a conforming implementation.
1.1. Relationship of Domain Objects and Host Objects
The EPP mapping for host objects is described in [RFC5732]. This
document assumes that domain name objects have a superordinate
relationship to subordinate host name objects. For example, domain
name "example.com" has a superordinate relationship to host name
"ns1.example.com". EPP actions (such as object transfers) that do
not preserve this relationship MUST be explicitly disallowed.
A host name object can be created in a repository for which no
superordinate domain name object exists. For example, host name
"ns1.example.com" can be created in the ".example" repository so that
DNS domains in ".example" can be delegated to the host. Such hosts
are described as "external" hosts in this specification since the
name of the host does not belong to the namespace of the repository
in which the host is being used for delegation purposes.
Whether a host is external or internal relates to the repository in
which the host is being used for delegation purposes. Whether or not
an internal host is subordinate relates to a domain within the
repository. For example, host ns1.example1.com is a subordinate host
of domain example1.com, but it is not a subordinate host of domain
example2.com. ns1.example1.com can be used as a name server for
example2.com. In this case, ns1.example1.com MUST be treated as an
internal host, subject to the rules governing operations on
subordinate hosts within the same repository.
Name server hosts for domain delegation can be specified either as
references to existing host objects or as domain attributes that
describe a host machine. A server operator MUST use one name server
specification form consistently. A server operator that announces
support for host objects in an EPP greeting MUST NOT allow domain
attributes to describe a name server host machine. A server operator
that does not announce support for host objects MUST allow domain
attributes to describe a name server host machine. When domain
attributes are used to describe a name server host machine, IP
addresses SHOULD be required only as needed to generate DNS glue
records.
Name servers are specified within a <domain:ns> element. This
element MUST contain one or more <domain:hostObj> elements or one or
more <domain:hostAttr> elements. A <domain:hostObj> element contains
the fully qualified name of a known name server host object. A
<domain:hostAttr> element contains the following child elements:
- A <domain:hostName> element that contains the fully qualified name
of a host.
- Zero or more OPTIONAL <domain:hostAddr> elements that contain the
IP addresses to be associated with the host. Each element MAY
contain an "ip" attribute to identify the IP address format.
Attribute value "v4" is used to note IPv4 address format.
Attribute value "v6" is used to note IPv6 address format. If the
"ip" attribute is not specified, "v4" is the default attribute
value. IP address syntax requirements are described in Section
2.5 of the EPP host mapping [RFC5732].
Example host-object name server elements for domain example.com:
<domain:ns>
<domain:hostObj>ns1.example.net</domain:hostObj>
<domain:hostObj>ns2.example.net</domain:hostObj>
</domain:ns>
Example host-attribute name server elements for domain example.com:
<domain:ns>
<domain:hostAttr>
<domain:hostName>ns1.example.net</domain:hostName>
<domain:hostAddr
ip="v4">192.0.2.2</domain:hostAddr>
<domain:hostAddr
ip="v6">1080:0:0:0:8:800:200C:417A</domain:hostAddr>
</domain:hostAttr>
<domain:hostAttr>
<domain:hostName>ns2.example.net</domain:hostName>
</domain:hostAttr>
</domain:ns>
1.2. Conventions Used in This Document
The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT",
"SHOULD", "SHOULD NOT", "RECOMMENDED", "MAY", and "OPTIONAL" in this
document are to be interpreted as described in [RFC2119].
In examples, "C:" represents lines sent by a protocol client and "S:"
represents lines returned by a protocol server. Indentation and
white space in examples are provided only to illustrate element
relationships and are not a REQUIRED feature of this protocol.
2. Object Attributes
An EPP domain object has attributes and associated values that can be
viewed and modified by the sponsoring client or the server. This
section describes each attribute type in detail. The formal syntax
for the attribute values described here can be found in the "Formal
Syntax" section of this document and in the appropriate normative
references.
2.1. Domain and Host Names
The syntax for domain and host names described in this document MUST
conform to [RFC0952] and [RFC1123]. At the time of this writing, RFC
3490 [RFC3490] describes a standard to use certain ASCII name labels
to represent non-ASCII name labels. These conformance requirements
might change as a result of progressing work in developing standards
for internationalized domain names. A server MAY restrict allowable
domain names to a particular top-level domain, second-level domain,
or other domain for which the server is authoritative. The trailing
dot required when these names are stored in a DNS zone is implicit
and MUST NOT be provided when exchanging host and domain names.
2.2. Contact and Client Identifiers
All EPP contacts are identified by a server-unique identifier.
Contact identifiers are character strings with a specified minimum
length, a specified maximum length, and a specified format. Contact
identifiers use the "clIDType" client identifier syntax described in
[RFC5730].
2.3. Status Values
A domain object MUST always have at least one associated status
value. Status values can be set only by the client that sponsors a
domain object and by the server on which the object resides. A
client can change the status of a domain object using the EPP
<update> command. Each status value MAY be accompanied by a string
of human-readable text that describes the rationale for the status
applied to the object.
A client MUST NOT alter status values set by the server. A server
MAY alter or override status values set by a client, subject to local
server policies. The status of an object MAY change as a result of
either a client-initiated transform command or an action performed by
a server operator.
Status values that can be added or removed by a client are prefixed
with "client". Corresponding status values that can be added or
removed by a server are prefixed with "server". Status values that
do not begin with either "client" or "server" are server-managed.
Status Value Descriptions:
- clientDeleteProhibited, serverDeleteProhibited
Requests to delete the object MUST be rejected.
- clientHold, serverHold
DNS delegation information MUST NOT be published for the object.
- clientRenewProhibited, serverRenewProhibited
Requests to renew the object MUST be rejected.
- clientTransferProhibited, serverTransferProhibited
Requests to transfer the object MUST be rejected.
- clientUpdateProhibited, serverUpdateProhibited
Requests to update the object (other than to remove this status)
MUST be rejected.
- inactive
Delegation information has not been associated with the object.
This is the default status when a domain object is first created
and there are no associated host objects for the DNS delegation.
This status can also be set by the server when all host-object
associations are removed.
- ok
This is the normal status value for an object that has no pending
operations or prohibitions. This value is set and removed by the
server as other status values are added or removed.
- pendingCreate, pendingDelete, pendingRenew, pendingTransfer,
pendingUpdate
A transform command has been processed for the object, but the
action has not been completed by the server. Server operators can
delay action completion for a variety of reasons, such as to allow
for human review or third-party action. A transform command that
is processed, but whose requested action is pending, is noted with
response code 1001.
When the requested action has been completed, the pendingCreate,
pendingDelete, pendingRenew, pendingTransfer, or pendingUpdate status
value MUST be removed. All clients involved in the transaction MUST
be notified using a service message that the action has been
completed and that the status of the object has changed.
"ok" status MUST NOT be combined with any other status.
"pendingDelete" status MUST NOT be combined with either
"clientDeleteProhibited" or "serverDeleteProhibited" status.
"pendingRenew" status MUST NOT be combined with either
"clientRenewProhibited" or "serverRenewProhibited" status.
"pendingTransfer" status MUST NOT be combined with either
"clientTransferProhibited" or "serverTransferProhibited" status.
"pendingUpdate" status MUST NOT be combined with either
"clientUpdateProhibited" or "serverUpdateProhibited" status.
The pendingCreate, pendingDelete, pendingRenew, pendingTransfer, and
pendingUpdate status values MUST NOT be combined with each other.
Other status combinations not expressly prohibited MAY be used.
2.4. Dates and Times
Date and time attribute values MUST be represented in Universal
Coordinated Time (UTC) using the Gregorian calendar. The extended
date-time form using upper case "T" and "Z" characters defined in
[W3C.REC-xmlschema-2-20041028] MUST be used to represent date-time
values, as XML Schema does not support truncated date-time forms or
lower case "T" and "Z" characters.
2.5. Validity Periods
A domain name object MAY have a specified validity period. If server
policy supports domain-object validity periods, the validity period
is defined when a domain object is created, and it MAY be extended by
the EPP <renew> or <transfer> commands. As a matter of server
policy, this specification does not define actions to be taken upon
expiration of a domain object's validity period.
Validity periods are measured in years or months with the appropriate
units specified using the "unit" attribute. Valid values for the
"unit" attribute are "y" for years and "m" for months. The minimum
allowable period value is one (1). The maximum allowable value is
ninety-nine decimal (99). A server MAY support a lower maximum
value.
2.6. Authorization Information
Authorization information is associated with domain objects to
facilitate transfer operations. Authorization information is
assigned when a domain object is created, and it might be updated in
the future. This specification describes password-based
authorization information, though other mechanisms are possible.
2.7. Other DNS Resource Record Attributes
While the DNS allows many resource record types to be associated with
a domain, this mapping only explicitly specifies elements that
describe resource records used for domain delegation and resolution.
Facilities to provision other domain-related resource record types
can be developed by extending this mapping.
The provisioning method described in this mapping separates discrete
data elements by data type. This method of data definition allows
XML Schema processors to perform basic syntax-validation tasks,
reducing ambiguity and the amount of parsing and syntax-checking work
required of protocol processors. Provisioning and extension methods
that aggregate data into opaque strings are possible, but such
methods should not be used because they impose additional parsing,
interpretation, and validation requirements on protocol processors.
3. EPP Command Mapping
A detailed description of the EPP syntax and semantics can be found
in [RFC5730]. The command mappings described here are specifically
for use in provisioning and managing Internet domain names via EPP.
3.1. EPP Query Commands
EPP provides three commands to retrieve domain information: <check>
to determine if a domain object can be provisioned within a
repository, <info> to retrieve detailed information associated with a
domain object, and <transfer> to retrieve domain-object transfer
status information.
3.1.1. EPP <check> Command
The EPP <check> command is used to determine if an object can be
provisioned within a repository. It provides a hint that allows a
client to anticipate the success or failure of provisioning an object
using the <create> command, as object-provisioning requirements are
ultimately a matter of server policy.
In addition to the standard EPP command elements, the <check> command
MUST contain a <domain:check> element that identifies the domain
namespace. The <domain:check> element contains the following child
elements:
- One or more <domain:name> elements that contain the fully
qualified names of the domain objects to be queried.
Example <check> command:
C:<?xml version="1.0" encoding="UTF-8" standalone="no"?>
C:<epp xmlns="urn:ietf:params:xml:ns:epp-1.0">
C: <command>
C: <check>
C: <domain:check
C: xmlns:domain="urn:ietf:params:xml:ns:domain-1.0">
C: <domain:name>example.com</domain:name>
C: <domain:name>example.net</domain:name>
C: <domain:name>example.org</domain:name>
C: </domain:check>
C: </check>
C: <clTRID>ABC-12345</clTRID>
C: </command>
C:</epp>
When a <check> command has been processed successfully, the EPP
<resData> element MUST contain a child <domain:chkData> element that
identifies the domain namespace. The <domain:chkData> element
contains one or more <domain:cd> elements that contain the following
child elements:
- A <domain:name> element that contains the fully qualified name of
the queried domain object. This element MUST contain an "avail"
attribute whose value indicates object availability (can it be
provisioned or not) at the moment the <check> command was
completed. A value of "1" or "true" means that the object can be
provisioned. A value of "0" or "false" means that the object can
not be provisioned.
- An OPTIONAL <domain:reason> element that MAY be provided when an
object cannot be provisioned. If present, this element contains
server-specific text to help explain why the object cannot be
provisioned. This text MUST be represented in the response
language previously negotiated with the client; an OPTIONAL "lang"
attribute MAY be present to identify the language if the
negotiated value is something other than the default value of "en"
(English).
Example <check> response:
S:<?xml version="1.0" encoding="UTF-8" standalone="no"?>
S:<epp xmlns="urn:ietf:params:xml:ns:epp-1.0">
S: <response>
S: <result code="1000">
S: <msg>Command completed successfully</msg>
S: </result>
S: <resData>
S: <domain:chkData
S: xmlns:domain="urn:ietf:params:xml:ns:domain-1.0">
S: <domain:cd>
S: <domain:name avail="1">example.com</domain:name>
S: </domain:cd>
S: <domain:cd>
S: <domain:name avail="0">example.net</domain:name>
S: <domain:reason>In use</domain:reason>
S: </domain:cd>
S: <domain:cd>
S: <domain:name avail="1">example.org</domain:name>
S: </domain:cd>
S: </domain:chkData>
S: </resData>
S: <trID>
S: <clTRID>ABC-12345</clTRID>
S: <svTRID>54322-XYZ</svTRID>
S: </trID>
S: </response>
S:</epp>
An EPP error response MUST be returned if a <check> command cannot be
processed for any reason.
3.1.2. EPP <info> Command
The EPP <info> command is used to retrieve information associated
with a domain object. The response to this command MAY vary
depending on the identity of the querying client, use of
authorization information, and server policy towards unauthorized
clients. If the querying client is the sponsoring client, all
available information MUST be returned. If the querying client is
not the sponsoring client but the client provides valid authorization
information, all available information MUST be returned. If the
querying client is not the sponsoring client and the client does not
provide valid authorization information, server policy determines
which OPTIONAL elements are returned.
In addition to the standard EPP command elements, the <info> command
MUST contain a <domain:info> element that identifies the domain
namespace. The <domain:info> element contains the following child
elements:
- A <domain:name> element that contains the fully qualified name of
the domain object to be queried. An OPTIONAL "hosts" attribute is
available to control return of information describing hosts
related to the domain object. A value of "all" (the default,
which MAY be absent) returns information describing both
subordinate and delegated hosts. A value of "del" returns
information describing only delegated hosts. A value of "sub"
returns information describing only subordinate hosts. A value of
"none" returns no information describing delegated or subordinate
hosts.
- An OPTIONAL <domain:authInfo> element that contains authorization
information associated with the domain object or authorization
information associated with the domain object's registrant or
associated contacts. An OPTIONAL "roid" attribute MUST be used to
identify the registrant or contact object if and only if the given
authInfo is associated with a registrant or contact object, and
not the domain object itself. If this element is not provided or
if the authorization information is invalid, server policy
determines if the command is rejected or if response information
will be returned to the client.
Example <info> command without authorization information:
C:<?xml version="1.0" encoding="UTF-8" standalone="no"?>
C:<epp xmlns="urn:ietf:params:xml:ns:epp-1.0">
C: <command>
C: <info>
C: <domain:info
C: xmlns:domain="urn:ietf:params:xml:ns:domain-1.0">
C: <domain:name hosts="all">example.com</domain:name>
C: </domain:info>
C: </info>
C: <clTRID>ABC-12345</clTRID>
C: </command>
C:</epp>
Example <info> command with authorization information:
C:<?xml version="1.0" encoding="UTF-8" standalone="no"?>
C:<epp xmlns="urn:ietf:params:xml:ns:epp-1.0">
C: <command>
C: <info>
C: <domain:info
C: xmlns:domain="urn:ietf:params:xml:ns:domain-1.0">
C: <domain:name hosts="all">example.com</domain:name>
C: <domain:authInfo>
C: <domain:pw>2fooBAR</domain:pw>
C: </domain:authInfo>
C: </domain:info>
C: </info>
C: <clTRID>ABC-12345</clTRID>
C: </command>
C:</epp>
When an <info> command has been processed successfully, the EPP
<resData> element MUST contain a child <domain:infData> element that
identifies the domain namespace. Elements that are not OPTIONAL MUST
be returned; OPTIONAL elements are returned based on client
authorization and server policy. The <domain:infData> element
contains the following child elements:
- A <domain:name> element that contains the fully qualified name of
the domain object.
- A <domain:roid> element that contains the Repository Object
IDentifier assigned to the domain object when the object was
created.
- Zero or more OPTIONAL <domain:status> elements that contain the
current status descriptors associated with the domain.
- If supported by the server, one OPTIONAL <domain:registrant>
element and one or more OPTIONAL <domain:contact> elements that
contain identifiers for the human or organizational social
information objects associated with the domain object.
- An OPTIONAL <domain:ns> element that contains the fully qualified
names of the delegated host objects or host attributes (name
servers) associated with the domain object. See Section 1.1 for a
description of the elements used to specify host objects or host
attributes.
- Zero or more OPTIONAL <domain:host> elements that contain the
fully qualified names of the subordinate host objects that exist
under this superordinate domain object.
- A <domain:clID> element that contains the identifier of the
sponsoring client.
- An OPTIONAL <domain:crID> element that contains the identifier of
the client that created the domain object.
- An OPTIONAL <domain:crDate> element that contains the date and
time of domain object creation.
- An OPTIONAL <domain:exDate> element that contains the date and
time identifying the end of the domain object's registration
period.
- An OPTIONAL <domain:upID> element that contains the identifier of
the client that last updated the domain object. This element MUST
NOT be present if the domain has never been modified.
- An OPTIONAL <domain:upDate> element that contains the date and
time of the most recent domain-object modification. This element
MUST NOT be present if the domain object has never been modified.
- An OPTIONAL <domain:trDate> element that contains the date and
time of the most recent successful domain-object transfer. This
element MUST NOT be provided if the domain object has never been
transferred.
- An OPTIONAL <domain:authInfo> element that contains authorization
information associated with the domain object. This element MUST
only be returned if the querying client is the current sponsoring
client or if the client supplied valid authorization information
with the command.
Example <info> response for an authorized client:
S:<?xml version="1.0" encoding="UTF-8" standalone="no"?>
S:<epp xmlns="urn:ietf:params:xml:ns:epp-1.0">
S: <response>
S: <result code="1000">
S: <msg>Command completed successfully</msg>
S: </result>
S: <resData>
S: <domain:infData
S: xmlns:domain="urn:ietf:params:xml:ns:domain-1.0">
S: <domain:name>example.com</domain:name>
S: <domain:roid>EXAMPLE1-REP</domain:roid>
S: <domain:status s="ok"/>
S: <domain:registrant>jd1234</domain:registrant>
S: <domain:contact type="admin">sh8013</domain:contact>
S: <domain:contact type="tech">sh8013</domain:contact>
S: <domain:ns>
S: <domain:hostObj>ns1.example.com</domain:hostObj>
S: <domain:hostObj>ns1.example.net</domain:hostObj>
S: </domain:ns>
S: <domain:host>ns1.example.com</domain:host>
S: <domain:host>ns2.example.com</domain:host>
S: <domain:clID>ClientX</domain:clID>
S: <domain:crID>ClientY</domain:crID>
S: <domain:crDate>1999-04-03T22:00:00.0Z</domain:crDate>
S: <domain:upID>ClientX</domain:upID>
S: <domain:upDate>1999-12-03T09:00:00.0Z</domain:upDate>
S: <domain:exDate>2005-04-03T22:00:00.0Z</domain:exDate>
S: <domain:trDate>2000-04-08T09:00:00.0Z</domain:trDate>
S: <domain:authInfo>
S: <domain:pw>2fooBAR</domain:pw>
S: </domain:authInfo>
S: </domain:infData>
S: </resData>
S: <trID>
S: <clTRID>ABC-12345</clTRID>
S: <svTRID>54322-XYZ</svTRID>
S: </trID>
S: </response>
S:</epp>
A server with a different information-return policy MAY provide less
information in a response.
Example <info> response for an unauthorized client:
S:<?xml version="1.0" encoding="UTF-8" standalone="no"?>
S:<epp xmlns="urn:ietf:params:xml:ns:epp-1.0">
S: <response>
S: <result code="1000">
S: <msg>Command completed successfully</msg>
S: </result>
S: <resData>
S: <domain:infData
S: xmlns:domain="urn:ietf:params:xml:ns:domain-1.0">
S: <domain:name>example.com</domain:name>
S: <domain:roid>EXAMPLE1-REP</domain:roid>
S: <domain:clID>ClientX</domain:clID>
S: </domain:infData>
S: </resData>
S: <trID>
S: <clTRID>ABC-12345</clTRID>
S: <svTRID>54322-XYZ</svTRID>
S: </trID>
S: </response>
S:</epp>
An EPP error response MUST be returned if an <info> command cannot be
processed for any reason.
3.1.3. EPP <transfer> Query Command
The EPP <transfer> command provides a query operation that allows a
client to determine the real-time status of pending and completed
transfer requests. In addition to the standard EPP command elements,
the <transfer> command MUST contain an "op" attribute with value
"query", and a <domain:transfer> element that identifies the domain
namespace. The <domain:transfer> element contains the following
child elements:
- A <domain:name> element that contains the fully qualified name of
the domain object to be queried.
- An OPTIONAL <domain:authInfo> element that contains authorization
information associated with the domain object or authorization
information associated with the domain object's registrant or
associated contacts. An OPTIONAL "roid" attribute MUST be used to
identify the registrant or contact object if and only if the given
authInfo is associated with a registrant or contact object, and
not the domain object itself. If this element is not provided or
if the authorization information is invalid, server policy
determines if the command is rejected or if response information
will be returned to the client.
Example <transfer> query command:
C:<?xml version="1.0" encoding="UTF-8" standalone="no"?>
C:<epp xmlns="urn:ietf:params:xml:ns:epp-1.0">
C: <command>
C: <transfer op="query">
C: <domain:transfer
C: xmlns:domain="urn:ietf:params:xml:ns:domain-1.0">
C: <domain:name>example.com</domain:name>
C: <domain:authInfo>
C: <domain:pw roid="JD1234-REP">2fooBAR</domain:pw>
C: </domain:authInfo>
C: </domain:transfer>
C: </transfer>
C: <clTRID>ABC-12345</clTRID>
C: </command>
C:</epp>
When a <transfer> query command has been processed successfully, the
EPP <resData> element MUST contain a child <domain:trnData> element
that identifies the domain namespace. The <domain:trnData> element
contains the following child elements:
- A <domain:name> element that contains the fully qualified name of
the domain object.
- A <domain:trStatus> element that contains the state of the most
recent transfer request.
- A <domain:reID> element that contains the identifier of the client
that requested the object transfer.
- A <domain:reDate> element that contains the date and time that the
transfer was requested.
- A <domain:acID> element that contains the identifier of the client
that SHOULD act upon a PENDING transfer request. For all other
status types, the value identifies the client that took the
indicated action.
- A <domain:acDate> element that contains the date and time of a
required or completed response. For a PENDING request, the value
identifies the date and time by which a response is required
before an automated response action will be taken by the server.
For all other status types, the value identifies the date and time
when the request was completed.
- An OPTIONAL <domain:exDate> element that contains the end of the
domain object's validity period if the <transfer> command caused
or causes a change in the validity period.
Example <transfer> query response:
S:<?xml version="1.0" encoding="UTF-8" standalone="no"?>
S:<epp xmlns="urn:ietf:params:xml:ns:epp-1.0">
S: <response>
S: <result code="1000">
S: <msg>Command completed successfully</msg>
S: </result>
S: <resData>
S: <domain:trnData
S: xmlns:domain="urn:ietf:params:xml:ns:domain-1.0">
S: <domain:name>example.com</domain:name>
S: <domain:trStatus>pending</domain:trStatus>
S: <domain:reID>ClientX</domain:reID>
S: <domain:reDate>2000-06-06T22:00:00.0Z</domain:reDate>
S: <domain:acID>ClientY</domain:acID>
S: <domain:acDate>2000-06-11T22:00:00.0Z</domain:acDate>
S: <domain:exDate>2002-09-08T22:00:00.0Z</domain:exDate>
S: </domain:trnData>
S: </resData>
S: <trID>
S: <clTRID>ABC-12345</clTRID>
S: <svTRID>54322-XYZ</svTRID>
S: </trID>
S: </response>
S:</epp>
An EPP error response MUST be returned if a <transfer> query command
cannot be processed for any reason.
3.2. EPP Transform Commands
EPP provides five commands to transform domain objects: <create> to
create an instance of a domain object, <delete> to delete an instance
of a domain object, <renew> to extend the validity period of a domain
object, <transfer> to manage domain object sponsorship changes, and
<update> to change information associated with a domain object.
Transform commands are typically processed and completed in real
time. Server operators MAY receive and process transform commands
but defer completing the requested action if human or third-party
review is required before the requested action can be completed. In
such situations the server MUST return a 1001 response code to the
client to note that the command has been received and processed but
that the requested action is pending. The server MUST also manage
the status of the object that is the subject of the command to
reflect the initiation and completion of the requested action. Once
the action has been completed, all clients involved in the
transaction MUST be notified using a service message that the action
has been completed and that the status of the object has changed.
Other notification methods MAY be used in addition to the required
service message.
Server operators SHOULD confirm that a client is authorized to
perform a transform command on a given object. Any attempt to
transform an object by an unauthorized client MUST be rejected, and
the server MUST return a 2201 response code to the client to note
that the client lacks privileges to execute the requested command.
3.2.1. EPP <create> Command
The EPP <create> command provides a transform operation that allows a
client to create a domain object. In addition to the standard EPP
command elements, the <create> command MUST contain a <domain:create>
element that identifies the domain namespace. The <domain:create>
element contains the following child elements:
- A <domain:name> element that contains the fully qualified name of
the domain object to be created.
- An OPTIONAL <domain:period> element that contains the initial
registration period of the domain object. A server MAY define a
default initial registration period if not specified by the
client.
- An OPTIONAL <domain:ns> element that contains the fully qualified
names of the delegated host objects or host attributes (name
servers) associated with the domain object to provide resolution
services for the domain; see Section 1.1 for a description of the
elements used to specify host objects or host attributes. A host
object MUST be known to the server before the host object can be
associated with a domain object.
- An OPTIONAL <domain:registrant> element that contains the
identifier for the human or organizational social information
(contact) object to be associated with the domain object as the
object registrant. This object identifier MUST be known to the
server before the contact object can be associated with the domain
object. The EPP mapping for contact objects is described in
[RFC5733].
- Zero or more OPTIONAL <domain:contact> elements that contain the
identifiers for other contact objects to be associated with the
domain object. Contact object identifiers MUST be known to the
server before the contact object can be associated with the domain
object.
- A <domain:authInfo> element that contains authorization
information to be associated with the domain object. This mapping
includes a password-based authentication mechanism, but the schema
allows new mechanisms to be defined in new schemas.
Example <create> command:
C:<?xml version="1.0" encoding="UTF-8" standalone="no"?>
C:<epp xmlns="urn:ietf:params:xml:ns:epp-1.0">
C: <command>
C: <create>
C: <domain:create
C: xmlns:domain="urn:ietf:params:xml:ns:domain-1.0">
C: <domain:name>example.com</domain:name>
C: <domain:period unit="y">2</domain:period>
C: <domain:ns>
C: <domain:hostObj>ns1.example.net</domain:hostObj>
C: <domain:hostObj>ns2.example.net</domain:hostObj>
C: </domain:ns>
C: <domain:registrant>jd1234</domain:registrant>
C: <domain:contact type="admin">sh8013</domain:contact>
C: <domain:contact type="tech">sh8013</domain:contact>
C: <domain:authInfo>
C: <domain:pw>2fooBAR</domain:pw>
C: </domain:authInfo>
C: </domain:create>
C: </create>
C: <clTRID>ABC-12345</clTRID>
C: </command>
C:</epp>
When a <create> command has been processed successfully, the EPP
<resData> element MUST contain a child <domain:creData> element that
identifies the domain namespace. The <domain:creData> element
contains the following child elements:
- A <domain:name> element that contains the fully qualified name of
the domain object.
- A <domain:crDate> element that contains the date and time of
domain object creation.
- An OPTIONAL <domain:exDate> element that contains the date and
time identifying the end of the domain object's registration
period.
Example <create> response:
S:<?xml version="1.0" encoding="UTF-8" standalone="no"?>
S:<epp xmlns="urn:ietf:params:xml:ns:epp-1.0">
S: <response>
S: <result code="1000">
S: <msg>Command completed successfully</msg>
S: </result>
S: <resData>
S: <domain:creData
S: xmlns:domain="urn:ietf:params:xml:ns:domain-1.0">
S: <domain:name>example.com</domain:name>
S: <domain:crDate>1999-04-03T22:00:00.0Z</domain:crDate>
S: <domain:exDate>2001-04-03T22:00:00.0Z</domain:exDate>
S: </domain:creData>
S: </resData>
S: <trID>
S: <clTRID>ABC-12345</clTRID>
S: <svTRID>54321-XYZ</svTRID>
S: </trID>
S: </response>
S:</epp>
An EPP error response MUST be returned if a <create> command cannot
be processed for any reason.
3.2.2. EPP <delete> Command
The EPP <delete> command provides a transform operation that allows a
client to delete a domain object. In addition to the standard EPP
command elements, the <delete> command MUST contain a <domain:delete>
element that identifies the domain namespace. The <domain:delete>
element contains the following child elements:
- A <domain:name> element that contains the fully qualified name of
the domain object to be deleted.
A domain object SHOULD NOT be deleted if subordinate host objects are
associated with the domain object. For example, if domain
"example.com" exists and host object "ns1.example.com" also exists,
then domain "example.com" SHOULD NOT be deleted until host
"ns1.example.com" has either been deleted or renamed to exist in a
different superordinate domain. A server SHOULD notify clients that
object relationships exist by sending a 2305 error response code when
a <delete> command is attempted and fails due to existing object
relationships. Delegated and subordinate host objects associated
with a domain object can be determined using the <info> query command
for the domain object.
Example <delete> command:
C:<?xml version="1.0" encoding="UTF-8" standalone="no"?>
C:<epp xmlns="urn:ietf:params:xml:ns:epp-1.0">
C: <command>
C: <delete>
C: <domain:delete
C: xmlns:domain="urn:ietf:params:xml:ns:domain-1.0">
C: <domain:name>example.com</domain:name>
C: </domain:delete>
C: </delete>
C: <clTRID>ABC-12345</clTRID>
C: </command>
C:</epp>
When a <delete> command has been processed successfully, a server
MUST respond with an EPP response with no <resData> element.
Example <delete> response:
S:<?xml version="1.0" encoding="UTF-8" standalone="no"?>
S:<epp xmlns="urn:ietf:params:xml:ns:epp-1.0">
S: <response>
S: <result code="1000">
S: <msg>Command completed successfully</msg>
S: </result>
S: <trID>
S: <clTRID>ABC-12345</clTRID>
S: <svTRID>54321-XYZ</svTRID>
S: </trID>
S: </response>
S:</epp>
An EPP error response MUST be returned if a <delete> command cannot
be processed for any reason.
3.2.3. EPP <renew> Command
The EPP <renew> command provides a transform operation that allows a
client to extend the validity period of a domain object. In addition
to the standard EPP command elements, the <renew> command MUST
contain a <domain:renew> element that identifies the domain
namespace. The <domain:renew> element contains the following child
elements:
- A <domain:name> element that contains the fully qualified name of
the domain object whose validity period is to be extended.
- A <domain:curExpDate> element that contains the date on which the
current validity period ends. This value ensures that repeated
<renew> commands do not result in multiple, unanticipated
successful renewals.
- An OPTIONAL <domain:period> element that contains the number of
units to be added to the registration period of the domain object.
The number of units available MAY be subject to limits imposed by
the server.
Example <renew> command:
C:<?xml version="1.0" encoding="UTF-8" standalone="no"?>
C:<epp xmlns="urn:ietf:params:xml:ns:epp-1.0">
C: <command>
C: <renew>
C: <domain:renew
C: xmlns:domain="urn:ietf:params:xml:ns:domain-1.0">
C: <domain:name>example.com</domain:name>
C: <domain:curExpDate>2000-04-03</domain:curExpDate>
C: <domain:period unit="y">5</domain:period>
C: </domain:renew>
C: </renew>
C: <clTRID>ABC-12345</clTRID>
C: </command>
C:</epp>
When a <renew> command has been processed successfully, the EPP
<resData> element MUST contain a child <domain:renData> element that
identifies the domain namespace. The <domain:renData> element
contains the following child elements:
- A <domain:name> element that contains the fully qualified name of
the domain object.
- An OPTIONAL <domain:exDate> element that contains the date and
time identifying the end of the domain object's registration
period.
Example <renew> response:
S:<?xml version="1.0" encoding="UTF-8" standalone="no"?>
S:<epp xmlns="urn:ietf:params:xml:ns:epp-1.0">
S: <response>
S: <result code="1000">
S: <msg>Command completed successfully</msg>
S: </result>
S: <resData>
S: <domain:renData
S: xmlns:domain="urn:ietf:params:xml:ns:domain-1.0">
S: <domain:name>example.com</domain:name>
S: <domain:exDate>2005-04-03T22:00:00.0Z</domain:exDate>
S: </domain:renData>
S: </resData>
S: <trID>
S: <clTRID>ABC-12345</clTRID>
S: <svTRID>54322-XYZ</svTRID>
S: </trID>
S: </response>
S:</epp>
An EPP error response MUST be returned if a <renew> command cannot be
processed for any reason.
3.2.4. EPP <transfer> Command
The EPP <transfer> command provides a transform operation that allows
a client to manage requests to transfer the sponsorship of a domain
object. In addition to the standard EPP command elements, the
<transfer> command MUST contain a <domain:transfer> element that
identifies the domain namespace. The <domain:transfer> element
contains the following child elements:
- A <domain:name> element that contains the fully qualified name of
the domain object for which a transfer request is to be created,
approved, rejected, or cancelled.
- An OPTIONAL <domain:period> element that contains the number of
units to be added to the registration period of the domain object
at completion of the transfer process. This element can only be
used when a transfer is requested, and it MUST be ignored if used
otherwise. The number of units available MAY be subject to limits
imposed by the server.
- A <domain:authInfo> element that contains authorization
information associated with the domain object or authorization
information associated with the domain object's registrant or
associated contacts. An OPTIONAL "roid" attribute MUST be used to
identify the registrant or contact object if and only if the given
authInfo is associated with a registrant or contact object, and
not the domain object itself.
Every EPP <transfer> command MUST contain an "op" attribute that
identifies the transfer operation to be performed. Valid values,
definitions, and authorizations for all attribute values are defined
in [RFC5730].
Transfer of a domain object MUST implicitly transfer all host objects
that are subordinate to the domain object. For example, if domain
object "example.com" is transferred and host object "ns1.example.com"
exists, the host object MUST be transferred as part of the
"example.com" transfer process. Host objects that are subject to
transfer when transferring a domain object are listed in the response
to an EPP <info> command performed on the domain object.
Example <transfer> request command:
C:<?xml version="1.0" encoding="UTF-8" standalone="no"?>
C:<epp xmlns="urn:ietf:params:xml:ns:epp-1.0">
C: <command>
C: <transfer op="request">
C: <domain:transfer
C: xmlns:domain="urn:ietf:params:xml:ns:domain-1.0">
C: <domain:name>example.com</domain:name>
C: <domain:period unit="y">1</domain:period>
C: <domain:authInfo>
C: <domain:pw roid="JD1234-REP">2fooBAR</domain:pw>
C: </domain:authInfo>
C: </domain:transfer>
C: </transfer>
C: <clTRID>ABC-12345</clTRID>
C: </command>
C:</epp>
When a <transfer> command has been processed successfully, the EPP
<resData> element MUST contain a child <domain:trnData> element that
identifies the domain namespace. The <domain:trnData> element
contains the same child elements defined for a transfer query
response.
Example <transfer> response:
S:<?xml version="1.0" encoding="UTF-8" standalone="no"?>
S:<epp xmlns="urn:ietf:params:xml:ns:epp-1.0">
S: <response>
S: <result code="1001">
S: <msg>Command completed successfully; action pending</msg>
S: </result>
S: <resData>
S: <domain:trnData
S: xmlns:domain="urn:ietf:params:xml:ns:domain-1.0">
S: <domain:name>example.com</domain:name>
S: <domain:trStatus>pending</domain:trStatus>
S: <domain:reID>ClientX</domain:reID>
S: <domain:reDate>2000-06-08T22:00:00.0Z</domain:reDate>
S: <domain:acID>ClientY</domain:acID>
S: <domain:acDate>2000-06-13T22:00:00.0Z</domain:acDate>
S: <domain:exDate>2002-09-08T22:00:00.0Z</domain:exDate>
S: </domain:trnData>
S: </resData>
S: <trID>
S: <clTRID>ABC-12345</clTRID>
S: <svTRID>54322-XYZ</svTRID>
S: </trID>
S: </response>
S:</epp>
An EPP error response MUST be returned if a <transfer> command can
not be processed for any reason.
3.2.5. EPP <update> Command
The EPP <update> command provides a transform operation that allows a
client to modify the attributes of a domain object. In addition to
the standard EPP command elements, the <update> command MUST contain
a <domain:update> element that identifies the domain namespace. The
<domain:update> element contains the following child elements:
- A <domain:name> element that contains the fully qualified name of
the domain object to be updated.
- An OPTIONAL <domain:add> element that contains attribute values to
be added to the object.
- An OPTIONAL <domain:rem> element that contains attribute values to
be removed from the object.
- An OPTIONAL <domain:chg> element that contains object attribute
values to be changed.
At least one <domain:add>, <domain:rem>, or <domain:chg> element MUST
be provided if the command is not being extended. All of these
elements MAY be omitted if an <update> extension is present. The
<domain:add> and <domain:rem> elements contain the following child
elements:
- An OPTIONAL <domain:ns> element that contains the fully qualified
names of the delegated host objects or host attributes (name
servers) associated with the domain object to provide resolution
services for the domain; see Section 1.1 for a description of the
elements used to specify host objects or host attributes. A host
object MUST be known to the server before the host object can be
associated with a domain object. If host attributes are used to
specify name servers, note that IP address elements are not needed
to identify a name server that is being removed. IP address
elements can safely be absent or ignored in this situation.
- Zero or more <domain:contact> elements that contain the
identifiers for contact objects to be associated with or removed
from the domain object. Contact object identifiers MUST be known
to the server before the contact object can be associated with the
domain object.
- Zero or more <domain:status> elements that contain status values
to be applied to or removed from the object. When specifying a
value to be removed, only the attribute value is significant;
element text is not required to match a value for removal.
A <domain:chg> element contains the following child elements:
- A <domain:registrant> element that contains the identifier for the
human or organizational social information (contact) object to be
associated with the domain object as the object registrant. This
object identifier MUST be known to the server before the contact
object can be associated with the domain object. An empty element
can be used to remove registrant information.
- A <domain:authInfo> element that contains authorization
information associated with the domain object. This mapping
includes a password-based authentication mechanism, but the schema
allows new mechanisms to be defined in new schemas. A <domain:
null> element can be used within the <domain:authInfo> element to
remove authorization information.
Example <update> command:
C:<?xml version="1.0" encoding="UTF-8" standalone="no"?>
C:<epp xmlns="urn:ietf:params:xml:ns:epp-1.0">
C: <command>
C: <update>
C: <domain:update
C: xmlns:domain="urn:ietf:params:xml:ns:domain-1.0">
C: <domain:name>example.com</domain:name>
C: <domain:add>
C: <domain:ns>
C: <domain:hostObj>ns2.example.com</domain:hostObj>
C: </domain:ns>
C: <domain:contact type="tech">mak21</domain:contact>
C: <domain:status s="clientHold"
C: lang="en">Payment overdue.</domain:status>
C: </domain:add>
C: <domain:rem>
C: <domain:ns>
C: <domain:hostObj>ns1.example.com</domain:hostObj>
C: </domain:ns>
C: <domain:contact type="tech">sh8013</domain:contact>
C: <domain:status s="clientUpdateProhibited"/>
C: </domain:rem>
C: <domain:chg>
C: <domain:registrant>sh8013</domain:registrant>
C: <domain:authInfo>
C: <domain:pw>2BARfoo</domain:pw>
C: </domain:authInfo>
C: </domain:chg>
C: </domain:update>
C: </update>
C: <clTRID>ABC-12345</clTRID>
C: </command>
C:</epp>
When an <update> command has been processed successfully, a server
MUST respond with an EPP response with no <resData> element.
Example <update> response:
S:<?xml version="1.0" encoding="UTF-8" standalone="no"?>
S:<epp xmlns="urn:ietf:params:xml:ns:epp-1.0">
S: <response>
S: <result code="1000">
S: <msg>Command completed successfully</msg>
S: </result>
S: <trID>
S: <clTRID>ABC-12345</clTRID>
S: <svTRID>54321-XYZ</svTRID>
S: </trID>
S: </response>
S:</epp>
An EPP error response MUST be returned if an <update> command cannot
be processed for any reason.
3.3. Offline Review of Requested Actions
Commands are processed by a server in the order they are received
from a client. Though an immediate response confirming receipt and
processing of the command is produced by the server, a server
operator MAY perform an offline review of requested transform
commands before completing the requested action. In such situations,
the response from the server MUST clearly note that the transform
command has been received and processed but that the requested action
is pending. The status of the corresponding object MUST clearly
reflect processing of the pending action. The server MUST notify the
client when offline processing of the action has been completed.
Examples describing a <create> command that requires offline review
are included here. Note the result code and message returned in
response to the <create> command.
S:<?xml version="1.0" encoding="UTF-8" standalone="no"?>
S:<epp xmlns="urn:ietf:params:xml:ns:epp-1.0">
S: <response>
S: <result code="1001">
S: <msg>Command completed successfully; action pending</msg>
S: </result>
S: <resData>
S: <domain:creData
S: xmlns:domain="urn:ietf:params:xml:ns:domain-1.0">
S: <domain:name>example.com</domain:name>
S: <domain:crDate>1999-04-03T22:00:00.0Z</domain:crDate>
S: <domain:exDate>2001-04-03T22:00:00.0Z</domain:exDate>
S: </domain:creData>
S: </resData>
S: <trID>
S: <clTRID>ABC-12345</clTRID>
S: <svTRID>54321-XYZ</svTRID>
S: </trID>
S: </response>
S:</epp>
The status of the domain object after returning this response MUST
include "pendingCreate". The server operator reviews the request
offline, and informs the client of the outcome of the review either
by queuing a service message for retrieval via the <poll> command or
by using an out-of-band mechanism to inform the client of the
request.
The service message MUST contain text that describes the notification
in the child <msg> element of the response <msgQ> element. In
addition, the EPP <resData> element MUST contain a child <domain:
panData> element that identifies the domain namespace. The <domain:
panData> element contains the following child elements:
- A <domain:name> element that contains the fully qualified name of
the domain object. The <domain:name> element contains a REQUIRED
"paResult" attribute. A positive boolean value indicates that the
request has been approved and completed. A negative boolean value
indicates that the request has been denied and the requested
action has not been taken.
- A <domain:paTRID> element that contains the client transaction
identifier and server transaction identifier returned with the
original response to process the command. The client transaction
identifier is OPTIONAL and will only be returned if the client
provided an identifier with the original <create> command.
- A <domain:paDate> element that contains the date and time
describing when review of the requested action was completed.
Example "review completed" service message:
S:<?xml version="1.0" encoding="UTF-8" standalone="no"?>
S:<epp xmlns="urn:ietf:params:xml:ns:epp-1.0">
S: <response>
S: <result code="1301">
S: <msg>Command completed successfully; ack to dequeue</msg>
S: </result>
S: <msgQ count="5" id="12345">
S: <qDate>1999-04-04T22:01:00.0Z</qDate>
S: <msg>Pending action completed successfully.</msg>
S: </msgQ>
S: <resData>
S: <domain:panData
S: xmlns:domain="urn:ietf:params:xml:ns:domain-1.0">
S: <domain:name paResult="1">example.com</domain:name>
S: <domain:paTRID>
S: <clTRID>ABC-12345</clTRID>
S: <svTRID>54321-XYZ</svTRID>
S: </domain:paTRID>
S: <domain:paDate>1999-04-04T22:00:00.0Z</domain:paDate>
S: </domain:panData>
S: </resData>
S: <trID>
S: <clTRID>BCD-23456</clTRID>
S: <svTRID>65432-WXY</svTRID>
S: </trID>
S: </response>
S:</epp>
4. Formal Syntax
An EPP object mapping is specified in XML Schema notation. The
formal syntax presented here is a complete schema representation of
the object mapping suitable for automated validation of EPP XML
instances. The BEGIN and END tags are not part of the schema; they
are used to note the beginning and ending of the schema for URI
registration purposes.
Copyright (c) 2009 IETF Trust and the persons identified as authors
of the code. All rights reserved.
Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions
are met:
o Redistributions of source code must retain the above copyright
notice, this list of conditions and the following disclaimer.
o Redistributions in binary form must reproduce the above copyright
notice, this list of conditions and the following disclaimer in
the documentation and/or other materials provided with the
distribution.
o Neither the name of Internet Society, IETF or IETF Trust, nor the
names of specific contributors, may be used to endorse or promote
products derived from this software without specific prior written
permission.
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
BEGIN
<?xml version="1.0" encoding="UTF-8"?>
<schema targetNamespace="urn:ietf:params:xml:ns:domain-1.0"
xmlns:domain="urn:ietf:params:xml:ns:domain-1.0"
xmlns:host="urn:ietf:params:xml:ns:host-1.0"
xmlns:epp="urn:ietf:params:xml:ns:epp-1.0"
xmlns:eppcom="urn:ietf:params:xml:ns:eppcom-1.0"
xmlns="http://www.w3.org/2001/XMLSchema"
elementFormDefault="qualified">
<!--
Import common element types.
-->
<import namespace="urn:ietf:params:xml:ns:eppcom-1.0"/>
<import namespace="urn:ietf:params:xml:ns:epp-1.0"/>
<import namespace="urn:ietf:params:xml:ns:host-1.0"/>
<annotation>
<documentation>
Extensible Provisioning Protocol v1.0
domain provisioning schema.
</documentation>
</annotation>
<!--
Child elements found in EPP commands.
-->
<element name="check" type="domain:mNameType"/>
<element name="create" type="domain:createType"/>
<element name="delete" type="domain:sNameType"/>
<element name="info" type="domain:infoType"/>
<element name="renew" type="domain:renewType"/>
<element name="transfer" type="domain:transferType"/>
<element name="update" type="domain:updateType"/>
<!--
Child elements of the <create> command.
-->
<complexType name="createType">
<sequence>
<element name="name" type="eppcom:labelType"/>
<element name="period" type="domain:periodType"
minOccurs="0"/>
<element name="ns" type="domain:nsType"
minOccurs="0"/>
<element name="registrant" type="eppcom:clIDType"
minOccurs="0"/>
<element name="contact" type="domain:contactType"
minOccurs="0" maxOccurs="unbounded"/>
<element name="authInfo" type="domain:authInfoType"/>
</sequence>
</complexType>
<complexType name="periodType">
<simpleContent>
<extension base="domain:pLimitType">
<attribute name="unit" type="domain:pUnitType"
use="required"/>
</extension>
</simpleContent>
</complexType>
<simpleType name="pLimitType">
<restriction base="unsignedShort">
<minInclusive value="1"/>
<maxInclusive value="99"/>
</restriction>
</simpleType>
<simpleType name="pUnitType">
<restriction base="token">
<enumeration value="y"/>
<enumeration value="m"/>
</restriction>
</simpleType>
<complexType name="nsType">
<choice>
<element name="hostObj" type="eppcom:labelType"
maxOccurs="unbounded"/>
<element name="hostAttr" type="domain:hostAttrType"
maxOccurs="unbounded"/>
</choice>
</complexType>
<!--
Name servers are either host objects or attributes.
-->
<complexType name="hostAttrType">
<sequence>
<element name="hostName" type="eppcom:labelType"/>
<element name="hostAddr" type="host:addrType"
minOccurs="0" maxOccurs="unbounded"/>
</sequence>
</complexType>
<!--
If attributes, addresses are optional and follow the
structure defined in the host mapping.
-->
<complexType name="contactType">
<simpleContent>
<extension base="eppcom:clIDType">
<attribute name="type" type="domain:contactAttrType"/>
</extension>
</simpleContent>
</complexType>
<simpleType name="contactAttrType">
<restriction base="token">
<enumeration value="admin"/>
<enumeration value="billing"/>
<enumeration value="tech"/>
</restriction>
</simpleType>
<complexType name="authInfoType">
<choice>
<element name="pw" type="eppcom:pwAuthInfoType"/>
<element name="ext" type="eppcom:extAuthInfoType"/>
</choice>
</complexType>
<!--
Child element of commands that require a single name.
-->
<complexType name="sNameType">
<sequence>
<element name="name" type="eppcom:labelType"/>
</sequence>
</complexType>
<!--
Child element of commands that accept multiple names.
-->
<complexType name="mNameType">
<sequence>
<element name="name" type="eppcom:labelType"
maxOccurs="unbounded"/>
</sequence>
</complexType>
<!--
Child elements of the <info> command.
-->
<complexType name="infoType">
<sequence>
<element name="name" type="domain:infoNameType"/>
<element name="authInfo" type="domain:authInfoType"
minOccurs="0"/>
</sequence>
</complexType>
<complexType name="infoNameType">
<simpleContent>
<extension base = "eppcom:labelType">
<attribute name="hosts" type="domain:hostsType"
default="all"/>
</extension>
</simpleContent>
</complexType>
<simpleType name="hostsType">
<restriction base="token">
<enumeration value="all"/>
<enumeration value="del"/>
<enumeration value="none"/>
<enumeration value="sub"/>
</restriction>
</simpleType>
<!--
Child elements of the <renew> command.
-->
<complexType name="renewType">
<sequence>
<element name="name" type="eppcom:labelType"/>
<element name="curExpDate" type="date"/>
<element name="period" type="domain:periodType"
minOccurs="0"/>
</sequence>
</complexType>
<!--
Child elements of the <transfer> command.
-->
<complexType name="transferType">
<sequence>
<element name="name" type="eppcom:labelType"/>
<element name="period" type="domain:periodType"
minOccurs="0"/>
<element name="authInfo" type="domain:authInfoType"
minOccurs="0"/>
</sequence>
</complexType>
<!--
Child elements of the <update> command.
-->
<complexType name="updateType">
<sequence>
<element name="name" type="eppcom:labelType"/>
<element name="add" type="domain:addRemType"
minOccurs="0"/>
<element name="rem" type="domain:addRemType"
minOccurs="0"/>
<element name="chg" type="domain:chgType"
minOccurs="0"/>
</sequence>
</complexType>
<!--
Data elements that can be added or removed.
-->
<complexType name="addRemType">
<sequence>
<element name="ns" type="domain:nsType"
minOccurs="0"/>
<element name="contact" type="domain:contactType"
minOccurs="0" maxOccurs="unbounded"/>
<element name="status" type="domain:statusType"
minOccurs="0" maxOccurs="11"/>
</sequence>
</complexType>
<!--
Data elements that can be changed.
-->
<complexType name="chgType">
<sequence>
<element name="registrant" type="domain:clIDChgType"
minOccurs="0"/>
<element name="authInfo" type="domain:authInfoChgType"
minOccurs="0"/>
</sequence>
</complexType>
<!--
Allow the registrant value to be nullified by changing the
minLength restriction to "0".
-->
<simpleType name="clIDChgType">
<restriction base="token">
<minLength value="0"/>
<maxLength value="16"/>
</restriction>
</simpleType>
<!--
Allow the authInfo value to be nullified by including an
empty element within the choice.
-->
<complexType name="authInfoChgType">
<choice>
<element name="pw" type="eppcom:pwAuthInfoType"/>
<element name="ext" type="eppcom:extAuthInfoType"/>
<element name="null"/>
</choice>
</complexType>
<!--
Child response elements.
-->
<element name="chkData" type="domain:chkDataType"/>
<element name="creData" type="domain:creDataType"/>
<element name="infData" type="domain:infDataType"/>
<element name="panData" type="domain:panDataType"/>
<element name="renData" type="domain:renDataType"/>
<element name="trnData" type="domain:trnDataType"/>
<!--
<check> response elements.
-->
<complexType name="chkDataType">
<sequence>
<element name="cd" type="domain:checkType"
maxOccurs="unbounded"/>
</sequence>
</complexType>
<complexType name="checkType">
<sequence>
<element name="name" type="domain:checkNameType"/>
<element name="reason" type="eppcom:reasonType"
minOccurs="0"/>
</sequence>
</complexType>
<complexType name="checkNameType">
<simpleContent>
<extension base="eppcom:labelType">
<attribute name="avail" type="boolean"
use="required"/>
</extension>
</simpleContent>
</complexType>
<!--
<create> response elements.
-->
<complexType name="creDataType">
<sequence>
<element name="name" type="eppcom:labelType"/>
<element name="crDate" type="dateTime"/>
<element name="exDate" type="dateTime"
minOccurs="0"/>
</sequence>
</complexType>
<!--
<info> response elements.
-->
<complexType name="infDataType">
<sequence>
<element name="name" type="eppcom:labelType"/>
<element name="roid" type="eppcom:roidType"/>
<element name="status" type="domain:statusType"
minOccurs="0" maxOccurs="11"/>
<element name="registrant" type="eppcom:clIDType"
minOccurs="0"/>
<element name="contact" type="domain:contactType"
minOccurs="0" maxOccurs="unbounded"/>
<element name="ns" type="domain:nsType"
minOccurs="0"/>
<element name="host" type="eppcom:labelType"
minOccurs="0" maxOccurs="unbounded"/>
<element name="clID" type="eppcom:clIDType"/>
<element name="crID" type="eppcom:clIDType"
minOccurs="0"/>
<element name="crDate" type="dateTime"
minOccurs="0"/>
<element name="upID" type="eppcom:clIDType"
minOccurs="0"/>
<element name="upDate" type="dateTime"
minOccurs="0"/>
<element name="exDate" type="dateTime"
minOccurs="0"/>
<element name="trDate" type="dateTime"
minOccurs="0"/>
<element name="authInfo" type="domain:authInfoType"
minOccurs="0"/>
</sequence>
</complexType>
<!--
Status is a combination of attributes and an optional
human-readable message that may be expressed in languages other
than English.
-->
<complexType name="statusType">
<simpleContent>
<extension base="normalizedString">
<attribute name="s" type="domain:statusValueType"
use="required"/>
<attribute name="lang" type="language"
default="en"/>
</extension>
</simpleContent>
</complexType>
<simpleType name="statusValueType">
<restriction base="token">
<enumeration value="clientDeleteProhibited"/>
<enumeration value="clientHold"/>
<enumeration value="clientRenewProhibited"/>
<enumeration value="clientTransferProhibited"/>
<enumeration value="clientUpdateProhibited"/>
<enumeration value="inactive"/>
<enumeration value="ok"/>
<enumeration value="pendingCreate"/>
<enumeration value="pendingDelete"/>
<enumeration value="pendingRenew"/>
<enumeration value="pendingTransfer"/>
<enumeration value="pendingUpdate"/>
<enumeration value="serverDeleteProhibited"/>
<enumeration value="serverHold"/>
<enumeration value="serverRenewProhibited"/>
<enumeration value="serverTransferProhibited"/>
<enumeration value="serverUpdateProhibited"/>
</restriction>
</simpleType>
<!--
Pending action notification response elements.
-->
<complexType name="panDataType">
<sequence>
<element name="name" type="domain:paNameType"/>
<element name="paTRID" type="epp:trIDType"/>
<element name="paDate" type="dateTime"/>
</sequence>
</complexType>
<complexType name="paNameType">
<simpleContent>
<extension base="eppcom:labelType">
<attribute name="paResult" type="boolean"
use="required"/>
</extension>
</simpleContent>
</complexType>
<!--
<renew> response elements.
-->
<complexType name="renDataType">
<sequence>
<element name="name" type="eppcom:labelType"/>
<element name="exDate" type="dateTime"
minOccurs="0"/>
</sequence>
</complexType>
<!--
<transfer> response elements.
-->
<complexType name="trnDataType">
<sequence>
<element name="name" type="eppcom:labelType"/>
<element name="trStatus" type="eppcom:trStatusType"/>
<element name="reID" type="eppcom:clIDType"/>
<element name="reDate" type="dateTime"/>
<element name="acID" type="eppcom:clIDType"/>
<element name="acDate" type="dateTime"/>
<element name="exDate" type="dateTime"
minOccurs="0"/>
</sequence>
</complexType>
<!--
End of schema.
-->
</schema>
END
5. Internationalization Considerations
EPP is represented in XML, which provides native support for encoding
information using the Unicode character set and its more compact
representations including UTF-8. Conformant XML processors recognize
both UTF-8 and UTF-16 [RFC2781]. Though XML includes provisions to
identify and use other character encodings through use of an
"encoding" attribute in an <?xml?> declaration, use of UTF-8 is
RECOMMENDED in environments where parser encoding support
incompatibility exists.
All date-time values presented via EPP MUST be expressed in Universal
Coordinated Time using the Gregorian calendar. XML Schema allows use
of time zone identifiers to indicate offsets from the zero meridian,
but this option MUST NOT be used with EPP. The extended date-time
form using upper case "T" and "Z" characters, defined in
[W3C.REC-xmlschema-2-20041028], MUST be used to represent date-time
values, as XML Schema does not support truncated date-time forms or
lower case "T" and "Z" characters.
This document requires domain and host name syntax as specified in
[RFC0952] as updated by [RFC1123]. At the time of this writing, RFC
3490 [RFC3490] describes a standard to use certain ASCII name labels
to represent non-ASCII name labels. These conformance requirements
might change as a result of progressing work in developing standards
for internationalized domain names.
6. IANA Considerations
This document uses URNs to describe XML namespaces and XML schemas
conforming to a registry mechanism described in [RFC3688]. Two URI
assignments have been registered by the IANA.
Registration request for the domain namespace:
URI: urn:ietf:params:xml:ns:domain-1.0
Registrant Contact: See the "Author's Address" section of this
document.
XML: None. Namespace URIs do not represent an XML specification.
Registration request for the domain XML schema:
URI: urn:ietf:params:xml:schema:domain-1.0
Registrant Contact: See the "Author's Address" section of this
document.
XML: See the "Formal Syntax" section of this document.
7. Security Considerations
Authorization information as described in Section 2.6 is REQUIRED to
create a domain object. This information is used in some query and
transfer operations as an additional means of determining client
authorization to perform the command. Failure to protect
authorization information from inadvertent disclosure can result in
unauthorized transfer operations and unauthorized information
release. Both client and server MUST ensure that authorization
information is stored and exchanged with high-grade encryption
mechanisms to provide privacy services.
The object mapping described in this document does not provide any
other security services or introduce any additional considerations
beyond those described by [RFC5730] or those caused by the protocol
layers used by EPP.
8. Acknowledgements
RFC 3731 is a product of the PROVREG working group, which suggested
improvements and provided many invaluable comments. The author
wishes to acknowledge the efforts of WG chairs Edward Lewis and Jaap
Akkerhuis for their process and editorial contributions. RFC 4931
and this document are individual submissions, based on the work done
in RFC 3731.
Specific suggestions that have been incorporated into this document
were provided by Joe Abley, Chris Bason, Eric Brunner-Williams,
Jordyn Buchanan, Dave Crocker, Ayesha Damaraju, Anthony Eden, Sheer
El-Showk, Klaus Malorny, Dan Manley, Michael Mealling, Patrick
Mevzek, Asbjorn Steira, Bruce Tonkin, and Rick Wesson.
9. References
9.1. Normative References
[RFC0952] Harrenstien, K., Stahl, M., and E. Feinler, "DoD Internet
host table specification", RFC 952, October 1985.
[RFC1123] Braden, R., "Requirements for Internet Hosts - Application
and Support", STD 3, RFC 1123, October 1989.
[RFC2119] Bradner, S., "Key words for use in RFCs to Indicate
Requirement Levels", BCP 14, RFC 2119, March 1997.
[RFC3688] Mealling, M., "The IETF XML Registry", BCP 81, RFC 3688,
January 2004.
[RFC5730] Hollenbeck, S., "Extensible Provisioning Protocol (EPP)",
STD 69, RFC 5730, August 2009.
[RFC5732] Hollenbeck, S., "Extensible Provisioning Protocol (EPP)
Host Mapping", STD 69, RFC 5732, August 2009.
[RFC5733] Hollenbeck, S., "Extensible Provisioning Protocol (EPP)
Contact Mapping", STD 69, RFC 5733, August 2009.
[W3C.REC-xml-20040204]
Sperberg-McQueen, C., Maler, E., Yergeau, F., Paoli, J.,
and T. Bray, "Extensible Markup Language (XML) 1.0 (Third
Edition)", World Wide Web Consortium FirstEdition REC-xml-
20040204, February 2004,
<http://www.w3.org/TR/2004/REC-xml-20040204>.
[W3C.REC-xmlschema-1-20041028]
Maloney, M., Thompson, H., Mendelsohn, N., and D. Beech,
"XML Schema Part 1: Structures Second Edition", World Wide
Web Consortium Recommendation REC-xmlschema-1-20041028,
October 2004,
<http://www.w3.org/TR/2004/REC-xmlschema-1-20041028>.
[W3C.REC-xmlschema-2-20041028]
Malhotra, A. and P. Biron, "XML Schema Part 2: Datatypes
Second Edition", World Wide Web Consortium
Recommendation REC-xmlschema-2-20041028, October 2004,
<http://www.w3.org/TR/2004/REC-xmlschema-2-20041028>.
9.2. Informative References
[RFC2781] Hoffman, P. and F. Yergeau, "UTF-16, an encoding of ISO
10646", RFC 2781, February 2000.
[RFC3490] Faltstrom, P., Hoffman, P., and A. Costello,
"Internationalizing Domain Names in Applications (IDNA)",
RFC 3490, March 2003.
[RFC4931] Hollenbeck, S., "Extensible Provisioning Protocol (EPP)
Domain Name Mapping", RFC 4931, May 2007.
Appendix A. Changes from RFC 4931
1. Changed "This document obsoletes RFC 3731" to "This document
obsoletes RFC 4931".
2. Replaced references to RFC 3731 with references to 4931.
3. Replaced references to RFC 4930 with references to 5730.
4. Replaced references to RFC 4932 with references to 5732.
5. Replaced references to RFC 4933 with references to 5733.
6. Updated description of inactive status in Section 2.3.
7. Fixed example host names in the Section 1.1 and Section 3.2.1
examples.
8. Changed "but such methods SHOULD NOT be used" to "but such
methods should not be used" in Section 2.7.
9. Added "Other notification methods MAY be used in addition to the
required service message" in Section 3.2.
10. Added 2201 response code text in Section 3.2.
11. Added BSD license text to XML schema section.
Author's Address
Scott Hollenbeck
VeriSign, Inc.
21345 Ridgetop Circle
Dulles, VA 20166-6503
US
EMail: shollenbeck@verisign.com
Network Working Group S. Hollenbeck
Request for Comments: 5732 VeriSign, Inc.
STD: 69 August 2009
Obsoletes: 4932
Category: Standards Track
Extensible Provisioning Protocol (EPP) Host Mapping
Abstract
This document describes an Extensible Provisioning Protocol (EPP)
mapping for the provisioning and management of Internet host names
stored in a shared central repository. Specified in XML, the mapping
defines EPP command syntax and semantics as applied to host names.
This document obsoletes RFC 4932.
Status of This Memo
This document specifies an Internet standards track protocol for the
Internet community, and requests discussion and suggestions for
improvements. Please refer to the current edition of the "Internet
Official Protocol Standards" (STD 1) for the standardization state
and status of this protocol. Distribution of this memo is unlimited.
Copyright Notice
Copyright (c) 2009 IETF Trust and the persons identified as the
document authors. All rights reserved.
This document is subject to BCP 78 and the IETF Trust's Legal
Provisions Relating to IETF Documents in effect on the date of
publication of this document (http://trustee.ietf.org/license-info).
Please review these documents carefully, as they describe your rights
and restrictions with respect to this document.
Table of Contents
1. Introduction ....................................................3
1.1. Relationship of Host Objects and Domain Objects ............3
1.2. Conventions Used in This Document ..........................4
2. Object Attributes ...............................................4
2.1. Host Names .................................................4
2.2. Client Identifiers .........................................4
2.3. Status Values ..............................................4
2.4. Dates and Times ............................................6
2.5. IP Addresses ...............................................6
3. EPP Command Mapping .............................................6
3.1. EPP Query Commands .........................................7
3.1.1. EPP <check> Command .................................7
3.1.2. EPP <info> Command ..................................9
3.1.3. EPP <transfer> Query Command .......................11
3.2. EPP Transform Commands ....................................11
3.2.1. EPP <create> Command ...............................12
3.2.2. EPP <delete> Command ...............................13
3.2.3. EPP <renew> Command ................................15
3.2.4. EPP <transfer> Command .............................15
3.2.5. EPP <update> Command ...............................15
3.3. Offline Review of Requested Actions .......................17
4. Formal Syntax ..................................................19
5. Internationalization Considerations ............................25
6. IANA Considerations ............................................25
7. Security Considerations ........................................26
8. Acknowledgements ...............................................26
9. References .....................................................26
9.1. Normative References ......................................26
9.2. Informative References ....................................27
Appendix A. Changes from RFC 4932 ................................29
1. Introduction
This document describes an Internet host name mapping for version 1.0
of the Extensible Provisioning Protocol (EPP). This mapping is
specified using the Extensible Markup Language (XML) 1.0 as described
in [W3C.REC-xml-20040204] and XML Schema notation as described in
[W3C.REC-xmlschema-1-20041028] and [W3C.REC-xmlschema-2-20041028].
This document obsoletes RFC 4932 [RFC4932].
[RFC5730] provides a complete description of EPP command and response
structures. A thorough understanding of the base protocol
specification is necessary to understand the mapping described in
this document.
XML is case sensitive. Unless stated otherwise, XML specifications
and examples provided in this document MUST be interpreted in the
character case presented to develop a conforming implementation.
1.1. Relationship of Host Objects and Domain Objects
This document assumes that host name objects have a subordinate
relationship to a superordinate domain name object. For example,
host name "ns1.example.com" has a subordinate relationship to domain
name "example.com". EPP actions (such as object transfers) that do
not preserve this relationship MUST be explicitly disallowed.
A host name object can be created in a repository for which no
superordinate domain name object exists. For example, host name
"ns1.example.com" can be created in the ".example" repository so that
DNS domains in ".example" can be delegated to the host. Such hosts
are described as "external" hosts in this specification since the
name of the host does not belong to the namespace of the repository
in which the host is being used for delegation purposes.
Whether a host is external or internal relates to the repository in
which the host is being used for delegation purposes. An internal
host is subordinate if the name of the host belongs to the domain
within the repository in which the host is being used for delegation
purposes. For example, host ns1.example1.com is a subordinate host
of domain example1.com, but it is not a subordinate host of domain
example2.com. ns1.example1.com can be used as a name server for
example2.com. In this case, ns1.example1.com MUST be treated as an
internal host, subject to the rules governing operations on
subordinate hosts within the same repository.
1.2. Conventions Used in This Document
The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT",
"SHOULD", "SHOULD NOT", "RECOMMENDED", "MAY", and "OPTIONAL" in this
document are to be interpreted as described in [RFC2119].
In examples, "C:" represents lines sent by a protocol client and "S:"
represents lines returned by a protocol server. Indentation and
white space in examples are provided only to illustrate element
relationships and are not a REQUIRED feature of this protocol.
2. Object Attributes
An EPP host object has attributes and associated values that can be
viewed and modified by the sponsoring client or the server. This
section describes each attribute type in detail. The formal syntax
for the attribute values described here can be found in the "Formal
Syntax" section of this document and in the appropriate normative
references.
2.1. Host Names
The syntax for host names described in this document MUST conform to
[RFC0952] as updated by [RFC1123]. At the time of this writing, RFC
3490 [RFC3490] describes a standard to use certain ASCII name labels
to represent non-ASCII name labels. These conformance requirements
might change in the future as a result of progressing work in
developing standards for internationalized host names.
2.2. Client Identifiers
All EPP clients are identified by a server-unique identifier. Client
identifiers conform to the "clIDType" syntax described in [RFC5730].
2.3. Status Values
A host object MUST always have at least one associated status value.
Status values MAY be set only by the client that sponsors a host
object and by the server on which the object resides. A client can
change the status of a host object using the EPP <update> command.
Each status value MAY be accompanied by a string of human-readable
text that describes the rationale for the status applied to the
object.
A client MUST NOT alter status values set by the server. A server
MAY alter or override status values set by a client, subject to local
server policies. The status of an object MAY change as a result of
either a client-initiated transform command or an action performed by
a server operator.
Status values that can be added or removed by a client are prefixed
with "client". Corresponding status values that can be added or
removed by a server are prefixed with "server". Status values that
do not begin with either "client" or "server" are server-managed.
Status Value Descriptions:
- clientDeleteProhibited, serverDeleteProhibited
Requests to delete the object MUST be rejected.
- clientUpdateProhibited, serverUpdateProhibited
Requests to update the object (other than to remove this status)
MUST be rejected.
- linked
The host object has at least one active association with another
object, such as a domain object. Servers SHOULD provide services
to determine existing object associations.
- ok
This is the normal status value for an object that has no pending
operations or prohibitions. This value is set and removed by the
server as other status values are added or removed.
- pendingCreate, pendingDelete, pendingTransfer, pendingUpdate
A transform command has been processed for the object (or in the
case of a <transfer> command, for the host object's superordinate
domain object), but the action has not been completed by the
server. Server operators can delay action completion for a
variety of reasons, such as to allow for human review or third-
party action. A transform command that is processed, but whose
requested action is pending, is noted with response code 1001.
When the requested action has been completed, the pendingCreate,
pendingDelete, pendingTransfer, or pendingUpdate status value MUST be
removed. All clients involved in the transaction MUST be notified
using a service message that the action has been completed and that
the status of the object has changed.
"ok" status MAY only be combined with "linked" status.
"linked" status MAY be combined with any status.
"pendingDelete" status MUST NOT be combined with either
"clientDeleteProhibited" or "serverDeleteProhibited" status.
"pendingUpdate" status MUST NOT be combined with either
"clientUpdateProhibited" or "serverUpdateProhibited" status.
The pendingCreate, pendingDelete, pendingTransfer, and pendingUpdate
status values MUST NOT be combined with each other.
Other status combinations not expressly prohibited MAY be used.
2.4. Dates and Times
Date and time attribute values MUST be represented in Universal
Coordinated Time (UTC) using the Gregorian calendar. The extended
date-time form using upper case "T" and "Z" characters defined in
[W3C.REC-xmlschema-2-20041028] MUST be used to represent date-time
values, as XML Schema does not support truncated date-time forms or
lower case "T" and "Z" characters.
2.5. IP Addresses
The syntax for IPv4 addresses described in this document MUST conform
to [RFC0791]. The syntax for IPv6 addresses described in this
document MUST conform to [RFC4291]. Practical considerations for
publishing IPv6 address information in zone files are documented in
[RFC2874] and [RFC3596]. A server MAY reject IP addresses that have
not been allocated for public use by IANA. When a host object is
provisioned for use as a DNS name server, IP addresses SHOULD be
required only as needed to generate DNS glue records.
3. EPP Command Mapping
A detailed description of the EPP syntax and semantics can be found
in [RFC5730]. The command mappings described here are specifically
for use in provisioning and managing Internet host names via EPP.
3.1. EPP Query Commands
EPP provides two commands to retrieve host information: <check> to
determine if a host object can be provisioned within a repository,
and <info> to retrieve detailed information associated with a host
object.
3.1.1. EPP <check> Command
The EPP <check> command is used to determine if an object can be
provisioned within a repository. It provides a hint that allows a
client to anticipate the success or failure of provisioning an object
using the <create> command, as object-provisioning requirements are
ultimately a matter of server policy.
In addition to the standard EPP command elements, the <check> command
MUST contain a <host:check> element that identifies the host
namespace. The <host:check> element contains the following child
elements:
- One or more <host:name> elements that contain the fully qualified
names of the host objects to be queried.
Example <check> command:
C:<?xml version="1.0" encoding="UTF-8" standalone="no"?>
C:<epp xmlns="urn:ietf:params:xml:ns:epp-1.0">
C: <command>
C: <check>
C: <host:check
C: xmlns:host="urn:ietf:params:xml:ns:host-1.0">
C: <host:name>ns1.example.com</host:name>
C: <host:name>ns2.example.com</host:name>
C: <host:name>ns3.example.com</host:name>
C: </host:check>
C: </check>
C: <clTRID>ABC-12345</clTRID>
C: </command>
C:</epp>
When a <check> command has been processed successfully, the EPP
<resData> element MUST contain a child <host:chkData> element that
identifies the host namespace. The <host:chkData> element contains
one or more <host:cd> elements that contain the following child
elements:
- A <host:name> element that contains the fully qualified name of
the queried host object. This element MUST contain an "avail"
attribute whose value indicates object availability (can it be
provisioned or not) at the moment the <check> command was
completed. A value of "1" or "true" means that the object can be
provisioned. A value of "0" or "false" means that the object
cannot be provisioned.
- An OPTIONAL <host:reason> element that MAY be provided when an
object cannot be provisioned. If present, this element contains
server-specific text to help explain why the object cannot be
provisioned. This text MUST be represented in the response
language previously negotiated with the client; an OPTIONAL "lang"
attribute MAY be present to identify the language if the
negotiated value is something other than the default value of "en"
(English).
Example <check> response:
S:<?xml version="1.0" encoding="UTF-8" standalone="no"?>
S:<epp xmlns="urn:ietf:params:xml:ns:epp-1.0">
S: <response>
S: <result code="1000">
S: <msg>Command completed successfully</msg>
S: </result>
S: <resData>
S: <host:chkData
S: xmlns:host="urn:ietf:params:xml:ns:host-1.0">
S: <host:cd>
S: <host:name avail="1">ns1.example.com</host:name>
S: </host:cd>
S: <host:cd>
S: <host:name avail="0">ns2.example2.com</host:name>
S: <host:reason>In use</host:reason>
S: </host:cd>
S: <host:cd>
S: <host:name avail="1">ns3.example3.com</host:name>
S: </host:cd>
S: </host:chkData>
S: </resData>
S: <trID>
S: <clTRID>ABC-12345</clTRID>
S: <svTRID>54322-XYZ</svTRID>
S: </trID>
S: </response>
S:</epp>
An EPP error response MUST be returned if a <check> command cannot be
processed for any reason.
3.1.2. EPP <info> Command
The EPP <info> command is used to retrieve information associated
with a host object. In addition to the standard EPP command
elements, the <info> command MUST contain a <host:info> element that
identifies the host namespace. The <host:info> element contains the
following child elements:
- A <host:name> element that contains the fully qualified name of
the host object for which information is requested.
Example <info> command:
C:<?xml version="1.0" encoding="UTF-8" standalone="no"?>
C:<epp xmlns="urn:ietf:params:xml:ns:epp-1.0">
C: <command>
C: <info>
C: <host:info
C: xmlns:host="urn:ietf:params:xml:ns:host-1.0">
C: <host:name>ns1.example.com</host:name>
C: </host:info>
C: </info>
C: <clTRID>ABC-12345</clTRID>
C: </command>
C:</epp>
When an <info> command has been processed successfully, the EPP
<resData> element MUST contain a child <host:infData> element that
identifies the host namespace. The <host:infData> element contains
the following child elements:
- A <host:name> element that contains the fully qualified name of
the host object.
- A <host:roid> element that contains the Repository Object
IDentifier assigned to the host object when the object was
created.
- One or more <host:status> elements that describe the status of the
host object.
- Zero or more <host:addr> elements that contain the IP addresses
associated with the host object.
- A <host:clID> element that contains the identifier of the
sponsoring client.
- A <host:crID> element that contains the identifier of the client
that created the host object.
- A <host:crDate> element that contains the date and time of host-
object creation.
- A <host:upID> element that contains the identifier of the client
that last updated the host object. This element MUST NOT be
present if the host object has never been modified.
- A <host:upDate> element that contains the date and time of the
most recent host-object modification. This element MUST NOT be
present if the host object has never been modified.
- A <host:trDate> element that contains the date and time of the
most recent successful host-object transfer. This element MUST
NOT be provided if the host object has never been transferred.
Note that host objects MUST NOT be transferred directly; host
objects MUST be transferred implicitly when the host object's
superordinate domain object is transferred. Host objects that are
subject to transfer when transferring a domain object are listed
in the response to an EPP <info> command performed on the domain
object.
Example <info> response:
S:<?xml version="1.0" encoding="UTF-8" standalone="no"?>
S:<epp xmlns="urn:ietf:params:xml:ns:epp-1.0">
S: <response>
S: <result code="1000">
S: <msg>Command completed successfully</msg>
S: </result>
S: <resData>
S: <host:infData
S: xmlns:host="urn:ietf:params:xml:ns:host-1.0">
S: <host:name>ns1.example.com</host:name>
S: <host:roid>NS1_EXAMPLE1-REP</host:roid>
S: <host:status s="linked"/>
S: <host:status s="clientUpdateProhibited"/>
S: <host:addr ip="v4">192.0.2.2</host:addr>
S: <host:addr ip="v4">192.0.2.29</host:addr>
S: <host:addr ip="v6">1080:0:0:0:8:800:200C:417A</host:addr>
S: <host:clID>ClientY</host:clID>
S: <host:crID>ClientX</host:crID>
S: <host:crDate>1999-04-03T22:00:00.0Z</host:crDate>
S: <host:upID>ClientX</host:upID>
S: <host:upDate>1999-12-03T09:00:00.0Z</host:upDate>
S: <host:trDate>2000-04-08T09:00:00.0Z</host:trDate>
S: </host:infData>
S: </resData>
S: <trID>
S: <clTRID>ABC-12345</clTRID>
S: <svTRID>54322-XYZ</svTRID>
S: </trID>
S: </response>
S:</epp>
An EPP error response MUST be returned if an <info> command cannot be
processed for any reason.
3.1.3. EPP <transfer> Query Command
Transfer semantics do not directly apply to host objects, so there is
no mapping defined for the EPP <transfer> query command.
3.2. EPP Transform Commands
EPP provides three commands to transform host objects: <create> to
create an instance of a host object, <delete> to delete an instance
of a host object, and <update> to change information associated with
a host object. This document does not define host-object mappings
for the EPP <renew> and <transfer> commands.
Transform commands are typically processed and completed in real
time. Server operators MAY receive and process transform commands
but defer completing the requested action if human or third-party
review is required before the requested action can be completed. In
such situations, the server MUST return a 1001 response code to the
client to note that the command has been received and processed but
that the requested action is pending. The server MUST also manage
the status of the object that is the subject of the command to
reflect the initiation and completion of the requested action. Once
the action has been completed, all clients involved in the
transaction MUST be notified using a service message that the action
has been completed and that the status of the object has changed.
Other notification methods MAY be used in addition to the required
service message.
Server operators SHOULD confirm that a client is authorized to
perform a transform command on a given object. Any attempt to
transform an object by an unauthorized client MUST be rejected, and
the server MUST return a 2201 response code to the client to note
that the client lacks privileges to execute the requested command.
3.2.1. EPP <create> Command
The EPP <create> command provides a transform operation that allows a
client to create a host object. In addition to the standard EPP
command elements, the <create> command MUST contain a <host:create>
element that identifies the host namespace. The <host:create>
element contains the following child elements:
- A <host:name> element that contains the fully qualified name of
the host object to be created.
- Zero or more <host:addr> elements that contain the IP addresses to
be associated with the host. Each element MAY contain an "ip"
attribute to identify the IP address format. Attribute value "v4"
is used to note IPv4 address format. Attribute value "v6" is used
to note IPv6 address format. If the "ip" attribute is not
specified, "v4" is the default attribute value.
Hosts can be provisioned for use as name servers in the Domain Name
System (DNS), described in [RFC1034] and [RFC1035]. Hosts
provisioned as name servers might be subject to server-operator
policies that require or prohibit specification of IP addresses,
depending on the name of the host and the namespace in which the
server will be used as a name server. When provisioned for use as a
name server, IP addresses are REQUIRED only as needed to produce DNS
glue records. For example, if the server is authoritative for the
"com" namespace and the name of the server is "ns1.example.net", the
server is not required to produce DNS glue records for the name
server, and IP addresses for the server are not required by the DNS.
If the host name exists in a namespace for which the server is
authoritative, then the superordinate domain of the host MUST be
known to the server before the host object can be created.
Example <create> command:
C:<?xml version="1.0" encoding="UTF-8" standalone="no"?>
C:<epp xmlns="urn:ietf:params:xml:ns:epp-1.0">
C: <command>
C: <create>
C: <host:create
C: xmlns:host="urn:ietf:params:xml:ns:host-1.0">
C: <host:name>ns1.example.com</host:name>
C: <host:addr ip="v4">192.0.2.2</host:addr>
C: <host:addr ip="v4">192.0.2.29</host:addr>
C: <host:addr ip="v6">1080:0:0:0:8:800:200C:417A</host:addr>
C: </host:create>
C: </create>
C: <clTRID>ABC-12345</clTRID>
C: </command>
C:</epp>
When a <create> command has been processed successfully, the EPP
<resData> element MUST contain a child <host:creData> element that
identifies the host namespace. The <host:creData> element contains
the following child elements:
- A <host:name> element that contains the fully qualified name of
the host object.
- A <host:crDate> element that contains the date and time of host-
object creation.
Example <create> response:
S:<?xml version="1.0" encoding="UTF-8" standalone="no"?>
S:<epp xmlns="urn:ietf:params:xml:ns:epp-1.0">
S: <response>
S: <result code="1000">
S: <msg>Command completed successfully</msg>
S: </result>
S: <resData>
S: <host:creData
S: xmlns:host="urn:ietf:params:xml:ns:host-1.0">
S: <host:name>ns1.example.com</host:name>
S: <host:crDate>1999-04-03T22:00:00.0Z</host:crDate>
S: </host:creData>
S: </resData>
S: <trID>
S: <clTRID>ABC-12345</clTRID>
S: <svTRID>54322-XYZ</svTRID>
S: </trID>
S: </response>
S:</epp>
An EPP error response MUST be returned if a <create> command cannot
be processed for any reason.
3.2.2. EPP <delete> Command
The EPP <delete> command provides a transform operation that allows a
client to delete a host object. In addition to the standard EPP
command elements, the <delete> command MUST contain a <host:delete>
element that identifies the host namespace. The <host:delete>
element contains the following child elements:
- A <host:name> element that contains the fully qualified name of
the host object to be deleted.
A host name object SHOULD NOT be deleted if the host object is
associated with any other object. For example, if the host object is
associated with a domain object, the host object SHOULD NOT be
deleted until the existing association has been broken. Deleting a
host object without first breaking existing associations can cause
DNS resolution failure for domain objects that refer to the deleted
host object.
Example <delete> command:
C:<?xml version="1.0" encoding="UTF-8" standalone="no"?>
C:<epp xmlns="urn:ietf:params:xml:ns:epp-1.0">
C: <command>
C: <delete>
C: <host:delete
C: xmlns:host="urn:ietf:params:xml:ns:host-1.0">
C: <host:name>ns1.example.com</host:name>
C: </host:delete>
C: </delete>
C: <clTRID>ABC-12345</clTRID>
C: </command>
C:</epp>
When a <delete> command has been processed successfully, a server
MUST respond with an EPP response with no <resData> element.
Example <delete> response:
S:<?xml version="1.0" encoding="UTF-8" standalone="no"?>
S:<epp xmlns="urn:ietf:params:xml:ns:epp-1.0">
S: <response>
S: <result code="1000">
S: <msg>Command completed successfully</msg>
S: </result>
S: <trID>
S: <clTRID>ABC-12345</clTRID>
S: <svTRID>54321-XYZ</svTRID>
S: </trID>
S: </response>
S:</epp>
An EPP error response MUST be returned if a <delete> command cannot
be processed for any reason.
3.2.3. EPP <renew> Command
Renewal semantics do not apply to host objects, so there is no
mapping defined for the EPP <renew> command.
3.2.4. EPP <transfer> Command
Transfer semantics do not directly apply to host objects, so there is
no mapping defined for the EPP <transfer> command. Host objects are
subordinate to an existing superordinate domain object and, as such,
they are subject to transfer when a domain object is transferred.
3.2.5. EPP <update> Command
The EPP <update> command provides a transform operation that allows a
client to modify the attributes of a host object. In addition to the
standard EPP command elements, the <update> command MUST contain a
<host:update> element that identifies the host namespace. The <host:
update> element contains the following child elements:
- A <host:name> element that contains the fully qualified name of
the host object to be updated.
- An OPTIONAL <host:add> element that contains attribute values to
be added to the object.
- An OPTIONAL <host:rem> element that contains attribute values to
be removed from the object.
- An OPTIONAL <host:chg> element that contains object attribute
values to be changed.
At least one <host:add>, <host:rem>, or <host:chg> element MUST be
provided if the command is not being extended. All of these elements
MAY be omitted if an <update> extension is present. The <host:add>
and <host:rem> elements contain the following child elements:
- One or more <host:addr> elements that contain IP addresses to be
associated with or removed from the host object. IP address
restrictions described in the <create> command mapping apply here
as well.
- One or more <host:status> elements that contain status values to
be associated with or removed from the object. When specifying a
value to be removed, only the attribute value is significant;
element text is not required to match a value for removal.
A <host:chg> element contains the following child elements:
- A <host:name> element that contains a new fully qualified host
name by which the host object will be known.
Host name changes MAY require the addition or removal of IP addresses
to be accepted by the server. IP address association MAY be subject
to server policies for provisioning hosts as name servers.
Host name changes can have an impact on associated objects that refer
to the host object. A host name change SHOULD NOT require additional
updates of associated objects to preserve existing associations, with
one exception: changing an external host object that has associations
with objects that are sponsored by a different client. Attempts to
update such hosts directly MUST fail with EPP error code 2305. The
change can be provisioned by creating a new external host with a new
name and any needed new attributes, and subsequently updating the
other objects sponsored by the client.
Example <update> command:
C:<?xml version="1.0" encoding="UTF-8" standalone="no"?>
C:<epp xmlns="urn:ietf:params:xml:ns:epp-1.0">
C: <command>
C: <update>
C: <host:update
C: xmlns:host="urn:ietf:params:xml:ns:host-1.0">
C: <host:name>ns1.example.com</host:name>
C: <host:add>
C: <host:addr ip="v4">192.0.2.22</host:addr>
C: <host:status s="clientUpdateProhibited"/>
C: </host:add>
C: <host:rem>
C: <host:addr ip="v6">1080:0:0:0:8:800:200C:417A</host:addr>
C: </host:rem>
C: <host:chg>
C: <host:name>ns2.example.com</host:name>
C: </host:chg>
C: </host:update>
C: </update>
C: <clTRID>ABC-12345</clTRID>
C: </command>
C:</epp>
When an <update> command has been processed successfully, a server
MUST respond with an EPP response with no <resData> element.
Example <update> response:
S:<?xml version="1.0" encoding="UTF-8" standalone="no"?>
S:<epp xmlns="urn:ietf:params:xml:ns:epp-1.0">
S: <response>
S: <result code="1000">
S: <msg>Command completed successfully</msg>
S: </result>
S: <trID>
S: <clTRID>ABC-12345</clTRID>
S: <svTRID>54321-XYZ</svTRID>
S: </trID>
S: </response>
S:</epp>
An EPP error response MUST be returned if an <update> command could
not be processed for any reason.
3.3. Offline Review of Requested Actions
Commands are processed by a server in the order they are received
from a client. Though an immediate response confirming receipt and
processing of the command is produced by the server, a server
operator MAY perform an offline review of requested transform
commands before completing the requested action. In such situations,
the response from the server MUST clearly note that the transform
command has been received and processed, but the requested action is
pending. The status of the corresponding object MUST clearly reflect
processing of the pending action. The server MUST notify the client
when offline processing of the action has been completed.
Examples describing a <create> command that requires offline review
are included here. Note the result code and message returned in
response to the <create> command.
S:<?xml version="1.0" encoding="UTF-8" standalone="no"?>
S:<epp xmlns="urn:ietf:params:xml:ns:epp-1.0">
S: <response>
S: <result code="1001">
S: <msg>Command completed successfully; action pending</msg>
S: </result>
S: <resData>
S: <host:creData
S: xmlns:host="urn:ietf:params:xml:ns:host-1.0">
S: <host:name>ns1.example.com</host:name>
S: <host:crDate>1999-04-03T22:00:00.0Z</host:crDate>
S: </host:creData>
S: </resData>
S: <trID>
S: <clTRID>ABC-12345</clTRID>
S: <svTRID>54322-XYZ</svTRID>
S: </trID>
S: </response>
S:</epp>
The status of the host object after returning this response MUST
include "pendingCreate". The server operator reviews the request
offline and informs the client of the outcome of the review either by
queuing a service message for retrieval via the <poll> command or by
using an out-of-band mechanism to inform the client of the request.
The service message MUST contain text that describes the notification
in the child <msg> element of the response <msgQ> element. In
addition, the EPP <resData> element MUST contain a child <host:
panData> element that identifies the host namespace. The <host:
panData> element contains the following child elements:
- A <host:name> element that contains the fully qualified name of
the host object. The <host:name> element contains a REQUIRED
"paResult" attribute. A positive boolean value indicates that the
request has been approved and completed. A negative boolean value
indicates that the request has been denied and the requested
action has not been taken.
- A <host:paTRID> element that contains the client transaction
identifier and server transaction identifier returned with the
original response to process the command. The client transaction
identifier is OPTIONAL and will only be returned if the client
provided an identifier with the original <create> command.
- A <host:paDate> element that contains the date and time describing
when review of the requested action was completed.
Example "review completed" service message:
S:<?xml version="1.0" encoding="UTF-8" standalone="no"?>
S:<epp xmlns="urn:ietf:params:xml:ns:epp-1.0">
S: <response>
S: <result code="1301">
S: <msg>Command completed successfully; ack to dequeue</msg>
S: </result>
S: <msgQ count="5" id="12345">
S: <qDate>1999-04-04T22:01:00.0Z</qDate>
S: <msg>Pending action completed successfully.</msg>
S: </msgQ>
S: <resData>
S: <host:panData
S: xmlns:host="urn:ietf:params:xml:ns:host-1.0">
S: <host:name paResult="1">ns1.example.com</host:name>
S: <host:paTRID>
S: <clTRID>ABC-12345</clTRID>
S: <svTRID>54322-XYZ</svTRID>
S: </host:paTRID>
S: <host:paDate>1999-04-04T22:00:00.0Z</host:paDate>
S: </host:panData>
S: </resData>
S: <trID>
S: <clTRID>BCD-23456</clTRID>
S: <svTRID>65432-WXY</svTRID>
S: </trID>
S: </response>
S:</epp>
4. Formal Syntax
An EPP object mapping is specified in XML Schema notation. The
formal syntax presented here is a complete schema representation of
the object mapping suitable for automated validation of EPP XML
instances. The BEGIN and END tags are not part of the schema; they
are used to note the beginning and ending of the schema for URI
registration purposes.
Copyright (c) 2009 IETF Trust and the persons identified as authors
of the code. All rights reserved.
Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions
are met:
o Redistributions of source code must retain the above copyright
notice, this list of conditions and the following disclaimer.
o Redistributions in binary form must reproduce the above copyright
notice, this list of conditions and the following disclaimer in
the documentation and/or other materials provided with the
distribution.
o Neither the name of Internet Society, IETF or IETF Trust, nor the
names of specific contributors, may be used to endorse or promote
products derived from this software without specific prior written
permission.
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
BEGIN
<?xml version="1.0" encoding="UTF-8"?>
<schema targetNamespace="urn:ietf:params:xml:ns:host-1.0"
xmlns:host="urn:ietf:params:xml:ns:host-1.0"
xmlns:epp="urn:ietf:params:xml:ns:epp-1.0"
xmlns:eppcom="urn:ietf:params:xml:ns:eppcom-1.0"
xmlns="http://www.w3.org/2001/XMLSchema"
elementFormDefault="qualified">
<!--
Import common element types.
-->
<import namespace="urn:ietf:params:xml:ns:eppcom-1.0"/>
<import namespace="urn:ietf:params:xml:ns:epp-1.0"/>
<annotation>
<documentation>
Extensible Provisioning Protocol v1.0
host provisioning schema.
</documentation>
</annotation>
<!--
Child elements found in EPP commands.
-->
<element name="check" type="host:mNameType"/>
<element name="create" type="host:createType"/>
<element name="delete" type="host:sNameType"/>
<element name="info" type="host:sNameType"/>
<element name="update" type="host:updateType"/>
<!--
Child elements of the <create> command.
-->
<complexType name="createType">
<sequence>
<element name="name" type="eppcom:labelType"/>
<element name="addr" type="host:addrType"
minOccurs="0" maxOccurs="unbounded"/>
</sequence>
</complexType>
<complexType name="addrType">
<simpleContent>
<extension base="host:addrStringType">
<attribute name="ip" type="host:ipType"
default="v4"/>
</extension>
</simpleContent>
</complexType>
<simpleType name="addrStringType">
<restriction base="token">
<minLength value="3"/>
<maxLength value="45"/>
</restriction>
</simpleType>
<simpleType name="ipType">
<restriction base="token">
<enumeration value="v4"/>
<enumeration value="v6"/>
</restriction>
</simpleType>
<!--
Child elements of the <delete> and <info> commands.
-->
<complexType name="sNameType">
<sequence>
<element name="name" type="eppcom:labelType"/>
</sequence>
</complexType>
<!--
Child element of commands that accept multiple names.
-->
<complexType name="mNameType">
<sequence>
<element name="name" type="eppcom:labelType"
maxOccurs="unbounded"/>
</sequence>
</complexType>
<!--
Child elements of the <update> command.
-->
<complexType name="updateType">
<sequence>
<element name="name" type="eppcom:labelType"/>
<element name="add" type="host:addRemType"
minOccurs="0"/>
<element name="rem" type="host:addRemType"
minOccurs="0"/>
<element name="chg" type="host:chgType"
minOccurs="0"/>
</sequence>
</complexType>
<!--
Data elements that can be added or removed.
-->
<complexType name="addRemType">
<sequence>
<element name="addr" type="host:addrType"
minOccurs="0" maxOccurs="unbounded"/>
<element name="status" type="host:statusType"
minOccurs="0" maxOccurs="7"/>
</sequence>
</complexType>
<!--
Data elements that can be changed.
-->
<complexType name="chgType">
<sequence>
<element name="name" type="eppcom:labelType"/>
</sequence>
</complexType>
<!--
Child response elements.
-->
<element name="chkData" type="host:chkDataType"/>
<element name="creData" type="host:creDataType"/>
<element name="infData" type="host:infDataType"/>
<element name="panData" type="host:panDataType"/>
<!--
<check> response elements.
-->
<complexType name="chkDataType">
<sequence>
<element name="cd" type="host:checkType"
maxOccurs="unbounded"/>
</sequence>
</complexType>
<complexType name="checkType">
<sequence>
<element name="name" type="host:checkNameType"/>
<element name="reason" type="eppcom:reasonType"
minOccurs="0"/>
</sequence>
</complexType>
<complexType name="checkNameType">
<simpleContent>
<extension base="eppcom:labelType">
<attribute name="avail" type="boolean"
use="required"/>
</extension>
</simpleContent>
</complexType>
<!--
<create> response elements.
-->
<complexType name="creDataType">
<sequence>
<element name="name" type="eppcom:labelType"/>
<element name="crDate" type="dateTime"/>
</sequence>
</complexType>
<!--
<info> response elements.
-->
<complexType name="infDataType">
<sequence>
<element name="name" type="eppcom:labelType"/>
<element name="roid" type="eppcom:roidType"/>
<element name="status" type="host:statusType"
maxOccurs="7"/>
<element name="addr" type="host:addrType"
minOccurs="0" maxOccurs="unbounded"/>
<element name="clID" type="eppcom:clIDType"/>
<element name="crID" type="eppcom:clIDType"/>
<element name="crDate" type="dateTime"/>
<element name="upID" type="eppcom:clIDType"
minOccurs="0"/>
<element name="upDate" type="dateTime"
minOccurs="0"/>
<element name="trDate" type="dateTime"
minOccurs="0"/>
</sequence>
</complexType>
<!--
Status is a combination of attributes and an optional human-readable
message that may be expressed in languages other than English.
-->
<complexType name="statusType">
<simpleContent>
<extension base="normalizedString">
<attribute name="s" type="host:statusValueType"
use="required"/>
<attribute name="lang" type="language"
default="en"/>
</extension>
</simpleContent>
</complexType>
<simpleType name="statusValueType">
<restriction base="token">
<enumeration value="clientDeleteProhibited"/>
<enumeration value="clientUpdateProhibited"/>
<enumeration value="linked"/>
<enumeration value="ok"/>
<enumeration value="pendingCreate"/>
<enumeration value="pendingDelete"/>
<enumeration value="pendingTransfer"/>
<enumeration value="pendingUpdate"/>
<enumeration value="serverDeleteProhibited"/>
<enumeration value="serverUpdateProhibited"/>
</restriction>
</simpleType>
<!--
Pending action notification response elements.
-->
<complexType name="panDataType">
<sequence>
<element name="name" type="host:paNameType"/>
<element name="paTRID" type="epp:trIDType"/>
<element name="paDate" type="dateTime"/>
</sequence>
</complexType>
<complexType name="paNameType">
<simpleContent>
<extension base="eppcom:labelType">
<attribute name="paResult" type="boolean"
use="required"/>
</extension>
</simpleContent>
</complexType>
<!--
End of schema.
-->
</schema>
END
5. Internationalization Considerations
EPP is represented in XML, which provides native support for encoding
information using the Unicode character set and its more compact
representations including UTF-8. Conformant XML processors recognize
both UTF-8 and UTF-16 [RFC2781]. Though XML includes provisions to
identify and use other character encodings through use of an
"encoding" attribute in an <?xml?> declaration, use of UTF-8 is
RECOMMENDED in environments where parser encoding support
incompatibility exists.
All date-time values presented via EPP MUST be expressed in Universal
Coordinated Time using the Gregorian calendar. XML Schema allows use
of time zone identifiers to indicate offsets from the zero meridian,
but this option MUST NOT be used with EPP. The extended date-time
form using upper case "T" and "Z" characters defined in
[W3C.REC-xmlschema-2-20041028] MUST be used to represent date-time
values, as XML Schema does not support truncated date-time forms or
lower case "T" and "Z" characters.
The syntax for domain and host names described in this document MUST
conform to [RFC0952] and [RFC1123]. At the time of this writing, RFC
3490 [RFC3490] describes a standard to use certain ASCII name labels
to represent non-ASCII name labels. These conformance requirements
might change as a result of progressing work in developing standards
for internationalized host names.
6. IANA Considerations
This document uses URNs to describe XML namespaces and XML schemas
conforming to a registry mechanism described in [RFC3688]. Two URI
assignments have been registered by the IANA.
Registration request for the host namespace:
URI: urn:ietf:params:xml:ns:host-1.0
Registrant Contact: See the "Author's Address" section of this
document.
XML: None. Namespace URIs do not represent an XML specification.
Registration request for the host XML schema:
URI: urn:ietf:params:xml:schema:host-1.0
Registrant Contact: See the "Author's Address" section of this
document.
XML: See the "Formal Syntax" section of this document.
7. Security Considerations
The object mapping described in this document does not provide any
security services or introduce any additional considerations beyond
those described by [RFC5730] or those caused by the protocol layers
used by EPP.
8. Acknowledgements
RFC 3732 is a product of the PROVREG working group, which suggested
improvements and provided many invaluable comments. The author
wishes to acknowledge the efforts of WG chairs Edward Lewis and Jaap
Akkerhuis for their process and editorial contributions. RFC 4932
and this document are individual submissions, based on the work done
in RFC 3732.
Specific suggestions that have been incorporated into this document
were provided by Chris Bason, Jordyn Buchanan, Dave Crocker, Anthony
Eden, Sheer El-Showk, Klaus Malorny, Dan Manley, Michael Mealling,
Patrick Mevzek, and Rick Wesson.
9. References
9.1. Normative References
[RFC0791] Postel, J., "Internet Protocol", STD 5, RFC 791,
September 1981.
[RFC0952] Harrenstien, K., Stahl, M., and E. Feinler, "DoD Internet
host table specification", RFC 952, October 1985.
[RFC1034] Mockapetris, P., "Domain names - concepts and facilities",
STD 13, RFC 1034, November 1987.
[RFC1035] Mockapetris, P., "Domain names - implementation and
specification", STD 13, RFC 1035, November 1987.
[RFC1123] Braden, R., "Requirements for Internet Hosts - Application
and Support", STD 3, RFC 1123, October 1989.
[RFC2119] Bradner, S., "Key words for use in RFCs to Indicate
Requirement Levels", BCP 14, RFC 2119, March 1997.
[RFC3688] Mealling, M., "The IETF XML Registry", BCP 81, RFC 3688,
January 2004.
[RFC4291] Hinden, R. and S. Deering, "IP Version 6 Addressing
Architecture", RFC 4291, February 2006.
[RFC5730] Hollenbeck, S., "Extensible Provisioning Protocol (EPP)",
STD 69, RFC 5730, August 2009.
[W3C.REC-xml-20040204]
Sperberg-McQueen, C., Maler, E., Yergeau, F., Paoli, J.,
and T. Bray, "Extensible Markup Language (XML) 1.0 (Third
Edition)", World Wide Web Consortium FirstEdition REC-xml-
20040204, February 2004,
<http://www.w3.org/TR/2004/REC-xml-20040204>.
[W3C.REC-xmlschema-1-20041028]
Maloney, M., Thompson, H., Mendelsohn, N., and D. Beech,
"XML Schema Part 1: Structures Second Edition", World Wide
Web Consortium Recommendation REC-xmlschema-1-20041028,
October 2004,
<http://www.w3.org/TR/2004/REC-xmlschema-1-20041028>.
[W3C.REC-xmlschema-2-20041028]
Malhotra, A. and P. Biron, "XML Schema Part 2: Datatypes
Second Edition", World Wide Web Consortium
Recommendation REC-xmlschema-2-20041028, October 2004,
<http://www.w3.org/TR/2004/REC-xmlschema-2-20041028>.
9.2. Informative References
[RFC2781] Hoffman, P. and F. Yergeau, "UTF-16, an encoding of ISO
10646", RFC 2781, February 2000.
[RFC2874] Crawford, M. and C. Huitema, "DNS Extensions to Support
IPv6 Address Aggregation and Renumbering", RFC 2874,
July 2000.
[RFC3490] Faltstrom, P., Hoffman, P., and A. Costello,
"Internationalizing Domain Names in Applications (IDNA)",
RFC 3490, March 2003.
[RFC3596] Thomson, S., Huitema, C., Ksinant, V., and M. Souissi,
"DNS Extensions to Support IP Version 6", RFC 3596,
October 2003.
[RFC4932] Hollenbeck, S., "Extensible Provisioning Protocol (EPP)
Host Mapping", RFC 4932, May 2007.
Appendix A. Changes from RFC 4932
1. Changed "This document obsoletes RFC 3732" to "This document
obsoletes RFC 4932".
2. Replaced references to RFC 1886 with references to 3596.
3. Removed references to RFC 3152 since both it and 1886 have been
obsoleted by 3596.
4. Replaced references to RFC 3732 with references to 4932.
5. Replaced references to RFC 4930 with references to 5730.
6. Added "Other notification methods MAY be used in addition to the
required service message" in Section 3.2.
7. Added 2201 response code text in Section 3.2.
8. Added BSD license text to XML schema section.
Author's Address
Scott Hollenbeck
VeriSign, Inc.
21345 Ridgetop Circle
Dulles, VA 20166-6503
US
EMail: shollenbeck@verisign.com
Network Working Group S. Hollenbeck
Request for Comments: 5733 VeriSign, Inc.
STD: 69 August 2009
Obsoletes: 4933
Category: Standards Track
Extensible Provisioning Protocol (EPP) Contact Mapping
Abstract
This document describes an Extensible Provisioning Protocol (EPP)
mapping for the provisioning and management of individual or
organizational social information identifiers (known as "contacts")
stored in a shared central repository. Specified in Extensible
Markup Language (XML), the mapping defines EPP command syntax and
semantics as applied to contacts. This document obsoletes RFC 4933.
Status of This Memo
This document specifies an Internet standards track protocol for the
Internet community, and requests discussion and suggestions for
improvements. Please refer to the current edition of the "Internet
Official Protocol Standards" (STD 1) for the standardization state
and status of this protocol. Distribution of this memo is unlimited.
Copyright Notice
Copyright (c) 2009 IETF Trust and the persons identified as the
document authors. All rights reserved.
This document is subject to BCP 78 and the IETF Trust's Legal
Provisions Relating to IETF Documents in effect on the date of
publication of this document (http://trustee.ietf.org/license-info).
Please review these documents carefully, as they describe your rights
and restrictions with respect to this document.
Table of Contents
1. Introduction ....................................................3
1.1. Conventions Used in This Document ..........................3
2. Object Attributes ...............................................3
2.1. Contact and Client Identifiers .............................3
2.2. Status Values ..............................................4
2.3. Individual and Organizational Names ........................5
2.4. Address ....................................................6
2.4.1. Street, City, and State or Province .................6
2.4.2. Postal Code .........................................6
2.4.3. Country .............................................6
2.5. Telephone Numbers ..........................................6
2.6. Email Addresses ............................................6
2.7. Dates and Times ............................................6
2.8. Authorization Information ..................................7
2.9. Disclosure of Data Elements and Attributes .................7
3. EPP Command Mapping .............................................8
3.1. EPP Query Commands .........................................8
3.1.1. EPP <check> Command .................................9
3.1.2. EPP <info> Command .................................11
3.1.3. EPP <transfer> Query Command .......................14
3.2. EPP Transform Commands ....................................16
3.2.1. EPP <create> Command ...............................17
3.2.2. EPP <delete> Command ...............................20
3.2.3. EPP <renew> Command ................................21
3.2.4. EPP <transfer> Command .............................21
3.2.5. EPP <update> Command ...............................23
3.3. Offline Review of Requested Actions .......................26
4. Formal Syntax ..................................................28
5. Internationalization Considerations ............................37
6. IANA Considerations ............................................37
7. Security Considerations ........................................38
8. Acknowledgements ...............................................38
9. References .....................................................39
9.1. Normative References ......................................39
9.2. Informative References ....................................40
Appendix A. Changes from RFC 4933 . . . . . . . . . . . . . . . . 42
1. Introduction
This document describes a personal and organizational identifier
mapping for version 1.0 of the Extensible Provisioning Protocol
(EPP). This mapping is specified using the Extensible Markup
Language (XML) 1.0 as described in [W3C.REC-xml-20040204] and XML
Schema notation as described in [W3C.REC-xmlschema-1-20041028] and
[W3C.REC-xmlschema-2-20041028]. This document obsoletes RFC 4933
[RFC4933].
[RFC5730] provides a complete description of EPP command and response
structures. A thorough understanding of the base protocol
specification is necessary to understand the mapping described in
this document.
XML is case sensitive. Unless stated otherwise, XML specifications
and examples provided in this document MUST be interpreted in the
character case presented to develop a conforming implementation.
1.1. Conventions Used in This Document
The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT",
"SHOULD", "SHOULD NOT", "RECOMMENDED", "MAY", and "OPTIONAL" in this
document are to be interpreted as described in [RFC2119].
In examples, "C:" represents lines sent by a protocol client and "S:"
represents lines returned by a protocol server. Indentation and
white space in examples are provided only to illustrate element
relationships and are not a REQUIRED feature of this protocol.
2. Object Attributes
An EPP contact object has attributes and associated values that can
be viewed and modified by the sponsoring client or the server. This
section describes each attribute type in detail. The formal syntax
for the attribute values described here can be found in the "Formal
Syntax" section of this document and in the appropriate normative
references.
2.1. Contact and Client Identifiers
All EPP contacts are identified by a server-unique identifier.
Contact identifiers are character strings with a specified minimum
length, a specified maximum length, and a specified format. Contact
identifiers use the "clIDType" client identifier syntax described in
[RFC5730].
2.2. Status Values
A contact object MUST always have at least one associated status
value. Status values can be set only by the client that sponsors a
contact object and by the server on which the object resides. A
client can change the status of a contact object using the EPP
<update> command. Each status value MAY be accompanied by a string
of human-readable text that describes the rationale for the status
applied to the object.
A client MUST NOT alter status values set by the server. A server
MAY alter or override status values set by a client, subject to local
server policies. The status of an object MAY change as a result of
either a client-initiated transform command or an action performed by
a server operator.
Status values that can be added or removed by a client are prefixed
with "client". Corresponding status values that can be added or
removed by a server are prefixed with "server". Status values that
do not begin with either "client" or "server" are server-managed.
Status Value Descriptions:
- clientDeleteProhibited, serverDeleteProhibited
Requests to delete the object MUST be rejected.
- clientTransferProhibited, serverTransferProhibited
Requests to transfer the object MUST be rejected.
- clientUpdateProhibited, serverUpdateProhibited
Requests to update the object (other than to remove this status)
MUST be rejected.
- linked
The contact object has at least one active association with
another object, such as a domain object. Servers SHOULD provide
services to determine existing object associations.
- ok
This is the normal status value for an object that has no pending
operations or prohibitions. This value is set and removed by the
server as other status values are added or removed.
- pendingCreate, pendingDelete, pendingTransfer, pendingUpdate
A transform command has been processed for the object, but the
action has not been completed by the server. Server operators can
delay action completion for a variety of reasons, such as to allow
for human review or third-party action. A transform command that
is processed, but whose requested action is pending, is noted with
response code 1001.
When the requested action has been completed, the pendingCreate,
pendingDelete, pendingTransfer, or pendingUpdate status value MUST be
removed. All clients involved in the transaction MUST be notified
using a service message that the action has been completed and that
the status of the object has changed.
"ok" status MAY only be combined with "linked" status.
"linked" status MAY be combined with any status.
"pendingDelete" status MUST NOT be combined with either
"clientDeleteProhibited" or "serverDeleteProhibited" status.
"pendingTransfer" status MUST NOT be combined with either
"clientTransferProhibited" or "serverTransferProhibited" status.
"pendingUpdate" status MUST NOT be combined with either
"clientUpdateProhibited" or "serverUpdateProhibited" status.
The pendingCreate, pendingDelete, pendingTransfer, and pendingUpdate
status values MUST NOT be combined with each other.
Other status combinations not expressly prohibited MAY be used.
2.3. Individual and Organizational Names
Individual and organizational names associated with a contact are
represented using character strings. These strings have a specified
minimum length and a specified maximum length. Individual and
organizational names MAY be provided in either UTF-8 [RFC3629] or a
subset of UTF-8 that can be represented in 7-bit ASCII, depending on
local needs.
2.4. Address
Every contact has associated postal-address information. A postal
address contains OPTIONAL street information, city information,
OPTIONAL state/province information, an OPTIONAL postal code, and a
country identifier. Address information MAY be provided in either
UTF-8 or a subset of UTF-8 that can be represented in 7-bit ASCII,
depending on local needs.
2.4.1. Street, City, and State or Province
Contact street, city, and state or province information is
represented using character strings. These strings have a specified
minimum length and a specified maximum length.
2.4.2. Postal Code
Contact postal codes are represented using character strings. These
strings have a specified minimum length and a specified maximum
length.
2.4.3. Country
Contact country identifiers are represented using two-character
identifiers specified in [ISO3166-1].
2.5. Telephone Numbers
Contact telephone number structure is derived from structures defined
in [ITU.E164.2005]. Telephone numbers described in this mapping are
character strings that MUST begin with a plus sign ("+", ASCII value
0x002B), followed by a country code defined in [ITU.E164.2005],
followed by a dot (".", ASCII value 0x002E), followed by a sequence
of digits representing the telephone number. An optional "x"
attribute is provided to note telephone extension information.
2.6. Email Addresses
Email address syntax is defined in [RFC5322]. This mapping does not
prescribe minimum or maximum lengths for character strings used to
represent email addresses.
2.7. Dates and Times
Date and time attribute values MUST be represented in Universal
Coordinated Time (UTC) using the Gregorian calendar. The extended
date-time form using upper case "T" and "Z" characters defined in
[W3C.REC-xmlschema-2-20041028] MUST be used to represent date-time
values, as XML Schema does not support truncated date-time forms or
lower case "T" and "Z" characters.
2.8. Authorization Information
Authorization information is associated with contact objects to
facilitate transfer operations. Authorization information is
assigned when a contact object is created, and it might be updated in
the future. This specification describes password-based
authorization information, though other mechanisms are possible.
2.9. Disclosure of Data Elements and Attributes
The EPP core protocol requires a server operator to announce data-
collection policies to clients; see Section 2.4 of [RFC5730]. In
conjunction with this disclosure requirement, this mapping includes
data elements that allow a client to identify elements that require
exceptional server-operator handling to allow or restrict disclosure
to third parties.
A server operator announces a default disclosure policy when
establishing a session with a client. When an object is created or
updated, the client can specify contact attributes that require
exceptional disclosure handling using an OPTIONAL <contact:disclose>
element. Once set, disclosure preferences can be reviewed using a
contact-information query. A server operator MUST reject any
transaction that requests disclosure practices that do not conform to
the announced data-collection policy with a 2308 error response code.
If present, the <contact:disclose> element MUST contain a "flag"
attribute. The "flag" attribute contains an XML Schema boolean
value. A value of "true" or "1" (one) notes a client preference to
allow disclosure of the specified elements as an exception to the
stated data-collection policy. A value of "false" or "0" (zero)
notes a client preference to not allow disclosure of the specified
elements as an exception to the stated data-collection policy.
The <contact:disclose> element MUST contain at least one of the
following child elements:
<contact:name type="int"/>
<contact:name type="loc"/>
<contact:org type="int"/>
<contact:org type="loc"/>
<contact:addr type="int"/>
<contact:addr type="loc"/>
<contact:voice/>
<contact:fax/>
<contact:email/>
Example <contact:disclose> element, flag="0":
<contact:disclose flag="0">
<contact:email/>
<contact:voice/>
</contact:disclose>
In this example, the contact email address and voice telephone number
cannot be disclosed. All other elements are subject to disclosure in
accordance with the server's data-collection policy.
Example <contact:disclose> element, flag="1":
<contact:disclose flag="1">
<contact:name type="int"/>
<contact:org type="int"/>
<contact:addr type="int"/>
</contact:disclose>
In this example, the internationalized contact name, organization,
and address information can be disclosed. All other elements are
subject to disclosure in accordance with the server's data-collection
policy.
Client-identification features provided by the EPP <login> command
and contact-authorization information are used to determine if a
client is authorized to perform contact-information query commands.
These features also determine if a client is authorized to receive
data that is otherwise marked for non-disclosure in a query response.
3. EPP Command Mapping
A detailed description of the EPP syntax and semantics can be found
in [RFC5730]. The command mappings described here are specifically
for use in provisioning and managing contact objects via EPP.
3.1. EPP Query Commands
EPP provides three commands to retrieve contact information: <check>
to determine if a contact object can be provisioned within a
repository, <info> to retrieve detailed information associated with a
contact object, and <transfer> to retrieve information regarding the
transfer status of the contact object.
3.1.1. EPP <check> Command
The EPP <check> command is used to determine if an object can be
provisioned within a repository. It provides a hint that allows a
client to anticipate the success or failure of provisioning an object
using the <create> command, as object-provisioning requirements are
ultimately a matter of server policy.
In addition to the standard EPP command elements, the <check> command
MUST contain a <contact:check> element that identifies the contact
namespace. The <contact:check> element contains the following child
elements:
- One or more <contact:id> elements that contain the server-unique
identifier of the contact objects to be queried.
Example <check> command:
C:<?xml version="1.0" encoding="UTF-8" standalone="no"?>
C:<epp xmlns="urn:ietf:params:xml:ns:epp-1.0">
C: <command>
C: <check>
C: <contact:check
C: xmlns:contact="urn:ietf:params:xml:ns:contact-1.0">
C: <contact:id>sh8013</contact:id>
C: <contact:id>sah8013</contact:id>
C: <contact:id>8013sah</contact:id>
C: </contact:check>
C: </check>
C: <clTRID>ABC-12345</clTRID>
C: </command>
C:</epp>
When a <check> command has been processed successfully, the EPP
<resData> element MUST contain a child <contact:chkData> element that
identifies the contact namespace. The <contact:chkData> element
contains one or more <contact:cd> elements that contain the following
child elements:
- A <contact:id> element that identifies the queried object. This
element MUST contain an "avail" attribute whose value indicates
object availability (can it be provisioned or not) at the moment
the <check> command was completed. A value of "1" or "true" means
that the object can be provisioned. A value of "0" or "false"
means that the object cannot be provisioned.
- An OPTIONAL <contact:reason> element that MAY be provided when an
object cannot be provisioned. If present, this element contains
server-specific text to help explain why the object cannot be
provisioned. This text MUST be represented in the response
language previously negotiated with the client; an OPTIONAL "lang"
attribute MAY be present to identify the language if the
negotiated value is something other than the default value of "en"
(English).
Example <check> response:
S:<?xml version="1.0" encoding="UTF-8" standalone="no"?>
S:<epp xmlns="urn:ietf:params:xml:ns:epp-1.0">
S: <response>
S: <result code="1000">
S: <msg>Command completed successfully</msg>
S: </result>
S: <resData>
S: <contact:chkData
S: xmlns:contact="urn:ietf:params:xml:ns:contact-1.0">
S: <contact:cd>
S: <contact:id avail="1">sh8013</contact:id>
S: </contact:cd>
S: <contact:cd>
S: <contact:id avail="0">sah8013</contact:id>
S: <contact:reason>In use</contact:reason>
S: </contact:cd>
S: <contact:cd>
S: <contact:id avail="1">8013sah</contact:id>
S: </contact:cd>
S: </contact:chkData>
S: </resData>
S: <trID>
S: <clTRID>ABC-12345</clTRID>
S: <svTRID>54322-XYZ</svTRID>
S: </trID>
S: </response>
S:</epp>
An EPP error response MUST be returned if a <check> command cannot be
processed for any reason.
3.1.2. EPP <info> Command
The EPP <info> command is used to retrieve information associated
with a contact object. In addition to the standard EPP command
elements, the <info> command MUST contain a <contact:info> element
that identifies the contact namespace. The <contact:info> element
contains the following child elements:
- A <contact:id> element that contains the server-unique identifier
of the contact object to be queried.
- An OPTIONAL <contact:authInfo> element that contains authorization
information associated with the contact object. If this element
is not provided or if the authorization information is invalid,
server policy determines if the command is rejected or if response
information will be returned to the client.
Example <info> command:
C:<?xml version="1.0" encoding="UTF-8" standalone="no"?>
C:<epp xmlns="urn:ietf:params:xml:ns:epp-1.0">
C: <command>
C: <info>
C: <contact:info
C: xmlns:contact="urn:ietf:params:xml:ns:contact-1.0">
C: <contact:id>sh8013</contact:id>
C: <contact:authInfo>
C: <contact:pw>2fooBAR</contact:pw>
C: </contact:authInfo>
C: </contact:info>
C: </info>
C: <clTRID>ABC-12345</clTRID>
C: </command>
C:</epp>
When an <info> command has been processed successfully, the EPP
<resData> element MUST contain a child <contact:infData> element that
identifies the contact namespace. The <contact:infData> element
contains the following child elements:
- A <contact:id> element that contains the server-unique identifier
of the contact object.
- A <contact:roid> element that contains the Repository Object
IDentifier assigned to the contact object when the object was
created.
- One or more <contact:status> elements that describe the status of
the contact object.
- One or two <contact:postalInfo> elements that contain postal-
address information. Two elements are provided so that address
information can be provided in both internationalized and
localized forms; a "type" attribute is used to identify the two
forms. If an internationalized form (type="int") is provided,
element content MUST be represented in a subset of UTF-8 that can
be represented in the 7-bit US-ASCII character set. If a
localized form (type="loc") is provided, element content MAY be
represented in unrestricted UTF-8. The <contact:postalInfo>
element contains the following child elements:
- A <contact:name> element that contains the name of the
individual or role represented by the contact.
- An OPTIONAL <contact:org> element that contains the name of the
organization with which the contact is affiliated.
- A <contact:addr> element that contains address information
associated with the contact. A <contact:addr> element contains
the following child elements:
- One, two, or three OPTIONAL <contact:street> elements that
contain the contact's street address.
- A <contact:city> element that contains the contact's city.
- An OPTIONAL <contact:sp> element that contains the contact's
state or province.
- An OPTIONAL <contact:pc> element that contains the contact's
postal code.
- A <contact:cc> element that contains the contact's country
code.
- An OPTIONAL <contact:voice> element that contains the contact's
voice telephone number.
- An OPTIONAL <contact:fax> element that contains the contact's
facsimile telephone number.
- A <contact:email> element that contains the contact's email
address.
- A <contact:clID> element that contains the identifier of the
sponsoring client.
- A <contact:crID> element that contains the identifier of the
client that created the contact object.
- A <contact:crDate> element that contains the date and time of
contact-object creation.
- A <contact:upID> element that contains the identifier of the
client that last updated the contact object. This element MUST
NOT be present if the contact has never been modified.
- A <contact:upDate> element that contains the date and time of the
most recent contact-object modification. This element MUST NOT be
present if the contact object has never been modified.
- A <contact:trDate> element that contains the date and time of the
most recent successful contact-object transfer. This element MUST
NOT be provided if the contact object has never been transferred.
- A <contact:authInfo> element that contains authorization
information associated with the contact object. This element MUST
NOT be provided if the querying client is not the current
sponsoring client.
- An OPTIONAL <contact:disclose> element that identifies elements
that require exceptional server-operator handling to allow or
restrict disclosure to third parties. See Section 2.9 for a
description of the child elements contained within the <contact:
disclose> element.
Example <info> response for an authorized client:
S:<?xml version="1.0" encoding="UTF-8" standalone="no"?>
S:<epp xmlns="urn:ietf:params:xml:ns:epp-1.0">
S: <response>
S: <result code="1000">
S: <msg>Command completed successfully</msg>
S: </result>
S: <resData>
S: <contact:infData
S: xmlns:contact="urn:ietf:params:xml:ns:contact-1.0">
S: <contact:id>sh8013</contact:id>
S: <contact:roid>SH8013-REP</contact:roid>
S: <contact:status s="linked"/>
S: <contact:status s="clientDeleteProhibited"/>
S: <contact:postalInfo type="int">
S: <contact:name>John Doe</contact:name>
S: <contact:org>Example Inc.</contact:org>
S: <contact:addr>
S: <contact:street>123 Example Dr.</contact:street>
S: <contact:street>Suite 100</contact:street>
S: <contact:city>Dulles</contact:city>
S: <contact:sp>VA</contact:sp>
S: <contact:pc>20166-6503</contact:pc>
S: <contact:cc>US</contact:cc>
S: </contact:addr>
S: </contact:postalInfo>
S: <contact:voice x="1234">+1.7035555555</contact:voice>
S: <contact:fax>+1.7035555556</contact:fax>
S: <contact:email>jdoe@example.com</contact:email>
S: <contact:clID>ClientY</contact:clID>
S: <contact:crID>ClientX</contact:crID>
S: <contact:crDate>1999-04-03T22:00:00.0Z</contact:crDate>
S: <contact:upID>ClientX</contact:upID>
S: <contact:upDate>1999-12-03T09:00:00.0Z</contact:upDate>
S: <contact:trDate>2000-04-08T09:00:00.0Z</contact:trDate>
S: <contact:authInfo>
S: <contact:pw>2fooBAR</contact:pw>
S: </contact:authInfo>
S: <contact:disclose flag="0">
S: <contact:voice/>
S: <contact:email/>
S: </contact:disclose>
S: </contact:infData>
S: </resData>
S: <trID>
S: <clTRID>ABC-12345</clTRID>
S: <svTRID>54322-XYZ</svTRID>
S: </trID>
S: </response>
S:</epp>
An EPP error response MUST be returned if an <info> command cannot be
processed for any reason.
3.1.3. EPP <transfer> Query Command
The EPP <transfer> command provides a query operation that allows a
client to determine the real-time status of pending and completed
transfer requests. In addition to the standard EPP command elements,
the <transfer> command MUST contain an "op" attribute with value
"query", and a <contact:transfer> element that identifies the contact
namespace. The <contact:transfer> element MUST contain the following
child elements:
- A <contact:id> element that contains the server-unique identifier
of the contact object to be queried.
- An OPTIONAL <contact:authInfo> element that contains authorization
information associated with the contact object. If this element
is not provided or if the authorization information is invalid,
server policy determines if the command is rejected or if response
information will be returned to the client.
Example <transfer> query command:
C:<?xml version="1.0" encoding="UTF-8" standalone="no"?>
C:<epp xmlns="urn:ietf:params:xml:ns:epp-1.0">
C: <command>
C: <transfer op="query">
C: <contact:transfer
C: xmlns:contact="urn:ietf:params:xml:ns:contact-1.0">
C: <contact:id>sh8013</contact:id>
C: <contact:authInfo>
C: <contact:pw>2fooBAR</contact:pw>
C: </contact:authInfo>
C: </contact:transfer>
C: </transfer>
C: <clTRID>ABC-12345</clTRID>
C: </command>
C:</epp>
When a <transfer> query command has been processed successfully, the
EPP <resData> element MUST contain a child <contact:trnData> element
that identifies the contact namespace. The <contact:trnData> element
contains the following child elements:
- A <contact:id> element that contains the server-unique identifier
for the queried contact.
- A <contact:trStatus> element that contains the state of the most
recent transfer request.
- A <contact:reID> element that contains the identifier of the
client that requested the object transfer.
- A <contact:reDate> element that contains the date and time that
the transfer was requested.
- A <contact:acID> element that contains the identifier of the
client that SHOULD act upon a PENDING transfer request. For all
other status types, the value identifies the client that took the
indicated action.
- A <contact:acDate> element that contains the date and time of a
required or completed response. For a pending request, the value
identifies the date and time by which a response is required
before an automated response action SHOULD be taken by the server.
For all other status types, the value identifies the date and time
when the request was completed.
Example <transfer> query response:
S:<?xml version="1.0" encoding="UTF-8" standalone="no"?>
S:<epp xmlns="urn:ietf:params:xml:ns:epp-1.0">
S: <response>
S: <result code="1000">
S: <msg>Command completed successfully</msg>
S: </result>
S: <resData>
S: <contact:trnData
S: xmlns:contact="urn:ietf:params:xml:ns:contact-1.0">
S: <contact:id>sh8013</contact:id>
S: <contact:trStatus>pending</contact:trStatus>
S: <contact:reID>ClientX</contact:reID>
S: <contact:reDate>2000-06-06T22:00:00.0Z</contact:reDate>
S: <contact:acID>ClientY</contact:acID>
S: <contact:acDate>2000-06-11T22:00:00.0Z</contact:acDate>
S: </contact:trnData>
S: </resData>
S: <trID>
S: <clTRID>ABC-12345</clTRID>
S: <svTRID>54322-XYZ</svTRID>
S: </trID>
S: </response>
S:</epp>
An EPP error response MUST be returned if a <transfer> query command
cannot be processed for any reason.
3.2. EPP Transform Commands
EPP provides four commands to transform contact-object information:
<create> to create an instance of a contact object, <delete> to
delete an instance of a contact object, <transfer> to manage contact-
object sponsorship changes, and <update> to change information
associated with a contact object. This document does not define a
mapping for the EPP <renew> command.
Transform commands are typically processed and completed in real
time. Server operators MAY receive and process transform commands
but defer completing the requested action if human or third-party
review is required before the requested action can be completed. In
such situations, the server MUST return a 1001 response code to the
client to note that the command has been received and processed but
that the requested action is pending. The server MUST also manage
the status of the object that is the subject of the command to
reflect the initiation and completion of the requested action. Once
the action has been completed, all clients involved in the
transaction MUST be notified using a service message that the action
has been completed and that the status of the object has changed.
Other notification methods MAY be used in addition to the required
service message.
Server operators SHOULD confirm that a client is authorized to
perform a transform command on a given object. Any attempt to
transform an object by an unauthorized client MUST be rejected, and
the server MUST return a 2201 response code to the client to note
that the client lacks privileges to execute the requested command.
3.2.1. EPP <create> Command
The EPP <create> command provides a transform operation that allows a
client to create a contact object. In addition to the standard EPP
command elements, the <create> command MUST contain a <contact:
create> element that identifies the contact namespace. The <contact:
create> element contains the following child elements:
- A <contact:id> element that contains the desired server-unique
identifier for the contact to be created.
- One or two <contact:postalInfo> elements that contain postal-
address information. Two elements are provided so that address
information can be provided in both internationalized and
localized forms; a "type" attribute is used to identify the two
forms. If an internationalized form (type="int") is provided,
element content MUST be represented in a subset of UTF-8 that can
be represented in the 7-bit US-ASCII character set. If a
localized form (type="loc") is provided, element content MAY be
represented in unrestricted UTF-8. The <contact:postalInfo>
element contains the following child elements:
o A <contact:name> element that contains the name of the
individual or role represented by the contact.
o An OPTIONAL <contact:org> element that contains the name of the
organization with which the contact is affiliated.
o A <contact:addr> element that contains address information
associated with the contact. A <contact:addr> element contains
the following child elements:
* One, two, or three OPTIONAL <contact:street> elements that
contain the contact's street address.
* A <contact:city> element that contains the contact's city.
* An OPTIONAL <contact:sp> element that contains the contact's
state or province.
* An OPTIONAL <contact:pc> element that contains the contact's
postal code.
* A <contact:cc> element that contains the contact's country
code.
- An OPTIONAL <contact:voice> element that contains the contact's
voice telephone number.
- An OPTIONAL <contact:fax> element that contains the contact's
facsimile telephone number.
- A <contact:email> element that contains the contact's email
address.
- A <contact:authInfo> element that contains authorization
information to be associated with the contact object. This
mapping includes a password-based authentication mechanism, but
the schema allows new mechanisms to be defined in new schemas.
- An OPTIONAL <contact:disclose> element that allows a client to
identify elements that require exceptional server-operator
handling to allow or restrict disclosure to third parties. See
Section 2.9 for a description of the child elements contained
within the <contact:disclose> element.
Example <create> command:
C:<?xml version="1.0" encoding="UTF-8" standalone="no"?>
C:<epp xmlns="urn:ietf:params:xml:ns:epp-1.0">
C: <command>
C: <create>
C: <contact:create
C: xmlns:contact="urn:ietf:params:xml:ns:contact-1.0">
C: <contact:id>sh8013</contact:id>
C: <contact:postalInfo type="int">
C: <contact:name>John Doe</contact:name>
C: <contact:org>Example Inc.</contact:org>
C: <contact:addr>
C: <contact:street>123 Example Dr.</contact:street>
C: <contact:street>Suite 100</contact:street>
C: <contact:city>Dulles</contact:city>
C: <contact:sp>VA</contact:sp>
C: <contact:pc>20166-6503</contact:pc>
C: <contact:cc>US</contact:cc>
C: </contact:addr>
C: </contact:postalInfo>
C: <contact:voice x="1234">+1.7035555555</contact:voice>
C: <contact:fax>+1.7035555556</contact:fax>
C: <contact:email>jdoe@example.com</contact:email>
C: <contact:authInfo>
C: <contact:pw>2fooBAR</contact:pw>
C: </contact:authInfo>
C: <contact:disclose flag="0">
C: <contact:voice/>
C: <contact:email/>
C: </contact:disclose>
C: </contact:create>
C: </create>
C: <clTRID>ABC-12345</clTRID>
C: </command>
C:</epp>
When a <create> command has been processed successfully, the EPP
<resData> element MUST contain a child <contact:creData> element that
identifies the contact namespace. The <contact:creData> element
contains the following child elements:
- A <contact:id> element that contains the server-unique identifier
for the created contact.
- A <contact:crDate> element that contains the date and time of
contact-object creation.
Example <create> response:
S:<?xml version="1.0" encoding="UTF-8" standalone="no"?>
S:<epp xmlns="urn:ietf:params:xml:ns:epp-1.0">
S: <response>
S: <result code="1000">
S: <msg>Command completed successfully</msg>
S: </result>
S: <resData>
S: <contact:creData
S: xmlns:contact="urn:ietf:params:xml:ns:contact-1.0">
S: <contact:id>sh8013</contact:id>
S: <contact:crDate>1999-04-03T22:00:00.0Z</contact:crDate>
S: </contact:creData>
S: </resData>
S: <trID>
S: <clTRID>ABC-12345</clTRID>
S: <svTRID>54321-XYZ</svTRID>
S: </trID>
S: </response>
S:</epp>
An EPP error response MUST be returned if a <create> command cannot
be processed for any reason.
3.2.2. EPP <delete> Command
The EPP <delete> command provides a transform operation that allows a
client to delete a contact object. In addition to the standard EPP
command elements, the <delete> command MUST contain a <contact:
delete> element that identifies the contact namespace. The <contact:
delete> element MUST contain the following child element:
- A <contact:id> element that contains the server-unique identifier
of the contact object to be deleted.
A contact object SHOULD NOT be deleted if it is associated with other
known objects. An associated contact SHOULD NOT be deleted until
associations with other known objects have been broken. A server
SHOULD notify clients that object relationships exist by sending a
2305 error response code when a <delete> command is attempted and
fails due to existing object relationships.
Example <delete> command:
C:<?xml version="1.0" encoding="UTF-8" standalone="no"?>
C:<epp xmlns="urn:ietf:params:xml:ns:epp-1.0">
C: <command>
C: <delete>
C: <contact:delete
C: xmlns:contact="urn:ietf:params:xml:ns:contact-1.0">
C: <contact:id>sh8013</contact:id>
C: </contact:delete>
C: </delete>
C: <clTRID>ABC-12345</clTRID>
C: </command>
C:</epp>
When a <delete> command has been processed successfully, a server
MUST respond with an EPP response with no <resData> element.
Example <delete> response:
S:<?xml version="1.0" encoding="UTF-8" standalone="no"?>
S:<epp xmlns="urn:ietf:params:xml:ns:epp-1.0">
S: <response>
S: <result code="1000">
S: <msg>Command completed successfully</msg>
S: </result>
S: <trID>
S: <clTRID>ABC-12345</clTRID>
S: <svTRID>54321-XYZ</svTRID>
S: </trID>
S: </response>
S:</epp>
An EPP error response MUST be returned if a <delete> command cannot
be processed for any reason.
3.2.3. EPP <renew> Command
Renewal semantics do not apply to contact objects, so there is no
mapping defined for the EPP <renew> command.
3.2.4. EPP <transfer> Command
The EPP <transfer> command provides a transform operation that allows
a client to manage requests to transfer the sponsorship of a contact
object. In addition to the standard EPP command elements, the
<transfer> command MUST contain a <contact:transfer> element that
identifies the contact namespace. The <contact:transfer> element
contains the following child elements:
- A <contact:id> element that contains the server-unique identifier
of the contact object for which a transfer request is to be
created, approved, rejected, or cancelled.
- A <contact:authInfo> element that contains authorization
information associated with the contact object.
Every EPP <transfer> command MUST contain an "op" attribute that
identifies the transfer operation to be performed, as defined in
[RFC5730].
Example <transfer> request command:
C:<?xml version="1.0" encoding="UTF-8" standalone="no"?>
C:<epp xmlns="urn:ietf:params:xml:ns:epp-1.0">
C: <command>
C: <transfer op="request">
C: <contact:transfer
C: xmlns:contact="urn:ietf:params:xml:ns:contact-1.0">
C: <contact:id>sh8013</contact:id>
C: <contact:authInfo>
C: <contact:pw>2fooBAR</contact:pw>
C: </contact:authInfo>
C: </contact:transfer>
C: </transfer>
C: <clTRID>ABC-12345</clTRID>
C: </command>
C:</epp>
When a <transfer> command has been processed successfully, the EPP
<resData> element MUST contain a child <contact:trnData> element that
identifies the contact namespace. The <contact:trnData> element
contains the same child elements defined for a <transfer> query
response.
Example <transfer> response:
S:<?xml version="1.0" encoding="UTF-8" standalone="no"?>
S:<epp xmlns="urn:ietf:params:xml:ns:epp-1.0">
S: <response>
S: <result code="1001">
S: <msg>Command completed successfully; action pending</msg>
S: </result>
S: <resData>
S: <contact:trnData
S: xmlns:contact="urn:ietf:params:xml:ns:contact-1.0">
S: <contact:id>sh8013</contact:id>
S: <contact:trStatus>pending</contact:trStatus>
S: <contact:reID>ClientX</contact:reID>
S: <contact:reDate>2000-06-08T22:00:00.0Z</contact:reDate>
S: <contact:acID>ClientY</contact:acID>
S: <contact:acDate>2000-06-13T22:00:00.0Z</contact:acDate>
S: </contact:trnData>
S: </resData>
S: <trID>
S: <clTRID>ABC-12345</clTRID>
S: <svTRID>54322-XYZ</svTRID>
S: </trID>
S: </response>
S:</epp>
An EPP error response MUST be returned if a <transfer> command cannot
be processed for any reason.
3.2.5. EPP <update> Command
The EPP <update> command provides a transform operation that allows a
client to modify the attributes of a contact object. In addition to
the standard EPP command elements, the <update> command MUST contain
a <contact:update> element that identifies the contact namespace.
The <contact:update> element contains the following child elements:
- A <contact:id> element that contains the server-unique identifier
of the contact object to be updated.
- An OPTIONAL <contact:add> element that contains attribute values
to be added to the object.
- An OPTIONAL <contact:rem> element that contains attribute values
to be removed from the object.
- An OPTIONAL <contact:chg> element that contains object attribute
values to be changed.
At least one <contact:add>, <contact:rem>, or <contact:chg> element
MUST be provided if the command is not being extended. All of these
elements MAY be omitted if an <update> extension is present. The
<contact:add> and <contact:rem> elements contain the following child
elements:
- One or more <contact:status> elements that contain status values
to be associated with or removed from the object. When specifying
a value to be removed, only the attribute value is significant;
element text is not required to match a value for removal.
A <contact:chg> element contains the following OPTIONAL child
elements. At least one child element MUST be present:
- One or two <contact:postalInfo> elements that contain postal-
address information. Two elements are provided so that address
information can be provided in both internationalized and
localized forms; a "type" attribute is used to identify the two
forms. If an internationalized form (type="int") is provided,
element content MUST be represented in a subset of UTF-8 that can
be represented in the 7-bit US-ASCII character set. If a
localized form (type="loc") is provided, element content MAY be
represented in unrestricted UTF-8. The <contact:postalInfo>
element contains the following OPTIONAL child elements:
o A <contact:name> element that contains the name of the
individual or role represented by the contact.
o A <contact:org> element that contains the name of the
organization with which the contact is affiliated.
o A <contact:addr> element that contains address information
associated with the contact. A <contact:addr> element contains
the following child elements:
* One, two, or three OPTIONAL <contact:street> elements that
contain the contact's street address.
* A <contact:city> element that contains the contact's city.
* An OPTIONAL <contact:sp> element that contains the contact's
state or province.
* An OPTIONAL <contact:pc> element that contains the contact's
postal code.
* A <contact:cc> element that contains the contact's country
code.
- A <contact:voice> element that contains the contact's voice
telephone number.
- A <contact:fax> element that contains the contact's facsimile
telephone number.
- A <contact:email> element that contains the contact's email
address.
- A <contact:authInfo> element that contains authorization
information associated with the contact object. This mapping
includes a password-based authentication mechanism, but the schema
allows new mechanisms to be defined in new schemas.
- A <contact:disclose> element that allows a client to identify
elements that require exceptional server-operator handling to
allow or restrict disclosure to third parties. See Section 2.9
for a description of the child elements contained within the
<contact:disclose> element.
Example <update> command:
C:<?xml version="1.0" encoding="UTF-8" standalone="no"?>
C:<epp xmlns="urn:ietf:params:xml:ns:epp-1.0">
C: <command>
C: <update>
C: <contact:update
C: xmlns:contact="urn:ietf:params:xml:ns:contact-1.0">
C: <contact:id>sh8013</contact:id>
C: <contact:add>
C: <contact:status s="clientDeleteProhibited"/>
C: </contact:add>
C: <contact:chg>
C: <contact:postalInfo type="int">
C: <contact:org/>
C: <contact:addr>
C: <contact:street>124 Example Dr.</contact:street>
C: <contact:street>Suite 200</contact:street>
C: <contact:city>Dulles</contact:city>
C: <contact:sp>VA</contact:sp>
C: <contact:pc>20166-6503</contact:pc>
C: <contact:cc>US</contact:cc>
C: </contact:addr>
C: </contact:postalInfo>
C: <contact:voice>+1.7034444444</contact:voice>
C: <contact:fax/>
C: <contact:authInfo>
C: <contact:pw>2fooBAR</contact:pw>
C: </contact:authInfo>
C: <contact:disclose flag="1">
C: <contact:voice/>
C: <contact:email/>
C: </contact:disclose>
C: </contact:chg>
C: </contact:update>
C: </update>
C: <clTRID>ABC-12345</clTRID>
C: </command>
C:</epp>
When an <update> command has been processed successfully, a server
MUST respond with an EPP response with no <resData> element.
Example <update> response:
S:<?xml version="1.0" encoding="UTF-8" standalone="no"?>
S:<epp xmlns="urn:ietf:params:xml:ns:epp-1.0">
S: <response>
S: <result code="1000">
S: <msg>Command completed successfully</msg>
S: </result>
S: <trID>
S: <clTRID>ABC-12345</clTRID>
S: <svTRID>54321-XYZ</svTRID>
S: </trID>
S: </response>
S:</epp>
An EPP error response MUST be returned if an <update> command cannot
be processed for any reason.
3.3. Offline Review of Requested Actions
Commands are processed by a server in the order they are received
from a client. Though an immediate response confirming receipt and
processing of the command is produced by the server, a server
operator MAY perform an offline review of requested transform
commands before completing the requested action. In such situations,
the response from the server MUST clearly note that the transform
command has been received and processed but that the requested action
is pending. The status of the corresponding object MUST clearly
reflect processing of the pending action. The server MUST notify the
client when offline processing of the action has been completed.
Examples describing a <create> command that requires offline review
are included here. Note the result code and message returned in
response to the <create> command.
S:<?xml version="1.0" encoding="UTF-8" standalone="no"?>
S:<epp xmlns="urn:ietf:params:xml:ns:epp-1.0">
S: <response>
S: <result code="1001">
S: <msg>Command completed successfully; action pending</msg>
S: </result>
S: <resData>
S: <contact:creData
S: xmlns:contact="urn:ietf:params:xml:ns:contact-1.0">
S: <contact:id>sh8013</contact:id>
S: <contact:crDate>1999-04-03T22:00:00.0Z</contact:crDate>
S: </contact:creData>
S: </resData>
S: <trID>
S: <clTRID>ABC-12345</clTRID>
S: <svTRID>54321-XYZ</svTRID>
S: </trID>
S: </response>
S:</epp>
The status of the contact object after returning this response MUST
include "pendingCreate". The server operator reviews the request
offline and informs the client of the outcome of the review either by
queuing a service message for retrieval via the <poll> command or by
using an out-of-band mechanism to inform the client of the request.
The service message MUST contain text that describes the notification
in the child <msg> element of the response <msgQ> element. In
addition, the EPP <resData> element MUST contain a child <contact:
panData> element that identifies the contact namespace. The
<contact:panData> element contains the following child elements:
- A <contact:id> element that contains the server-unique identifier
of the contact object. The <contact:id> element contains a
REQUIRED "paResult" attribute. A positive boolean value indicates
that the request has been approved and completed. A negative
boolean value indicates that the request has been denied and the
requested action has not been taken.
- A <contact:paTRID> element that contains the client transaction
identifier and server transaction identifier returned with the
original response to process the command. The client transaction
identifier is OPTIONAL and will only be returned if the client
provided an identifier with the original <create> command.
- A <contact:paDate> element that contains the date and time
describing when review of the requested action was completed.
Example "review completed" service message:
S:<?xml version="1.0" encoding="UTF-8" standalone="no"?>
S:<epp xmlns="urn:ietf:params:xml:ns:epp-1.0">
S: <response>
S: <result code="1301">
S: <msg>Command completed successfully; ack to dequeue</msg>
S: </result>
S: <msgQ count="5" id="12345">
S: <qDate>1999-04-04T22:01:00.0Z</qDate>
S: <msg>Pending action completed successfully.</msg>
S: </msgQ>
S: <resData>
S: <contact:panData
S: xmlns:contact="urn:ietf:params:xml:ns:contact-1.0">
S: <contact:id paResult="1">sh8013</contact:id>
S: <contact:paTRID>
S: <clTRID>ABC-12345</clTRID>
S: <svTRID>54321-XYZ</svTRID>
S: </contact:paTRID>
S: <contact:paDate>1999-04-04T22:00:00.0Z</contact:paDate>
S: </contact:panData>
S: </resData>
S: <trID>
S: <clTRID>BCD-23456</clTRID>
S: <svTRID>65432-WXY</svTRID>
S: </trID>
S: </response>
S:</epp>
4. Formal Syntax
An EPP object mapping is specified in XML Schema notation. The
formal syntax presented here is a complete schema representation of
the object mapping suitable for automated validation of EPP XML
instances. The BEGIN and END tags are not part of the schema; they
are used to note the beginning and ending of the schema for URI
registration purposes.
Copyright (c) 2009 IETF Trust and the persons identified as authors
of the code. All rights reserved.
Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions
are met:
o Redistributions of source code must retain the above copyright
notice, this list of conditions and the following disclaimer.
o Redistributions in binary form must reproduce the above copyright
notice, this list of conditions and the following disclaimer in
the documentation and/or other materials provided with the
distribution.
o Neither the name of Internet Society, IETF or IETF Trust, nor the
names of specific contributors, may be used to endorse or promote
products derived from this software without specific prior written
permission.
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
BEGIN
<?xml version="1.0" encoding="UTF-8"?>
<schema targetNamespace="urn:ietf:params:xml:ns:contact-1.0"
xmlns:contact="urn:ietf:params:xml:ns:contact-1.0"
xmlns:epp="urn:ietf:params:xml:ns:epp-1.0"
xmlns:eppcom="urn:ietf:params:xml:ns:eppcom-1.0"
xmlns="http://www.w3.org/2001/XMLSchema"
elementFormDefault="qualified">
<!--
Import common element types.
-->
<import namespace="urn:ietf:params:xml:ns:eppcom-1.0"/>
<import namespace="urn:ietf:params:xml:ns:epp-1.0"/>
<annotation>
<documentation>
Extensible Provisioning Protocol v1.0
contact provisioning schema.
</documentation>
</annotation>
<!--
Child elements found in EPP commands.
-->
<element name="check" type="contact:mIDType"/>
<element name="create" type="contact:createType"/>
<element name="delete" type="contact:sIDType"/>
<element name="info" type="contact:authIDType"/>
<element name="transfer" type="contact:authIDType"/>
<element name="update" type="contact:updateType"/>
<!--
Utility types.
-->
<simpleType name="ccType">
<restriction base="token">
<length value="2"/>
</restriction>
</simpleType>
<complexType name="e164Type">
<simpleContent>
<extension base="contact:e164StringType">
<attribute name="x" type="token"/>
</extension>
</simpleContent>
</complexType>
<simpleType name="e164StringType">
<restriction base="token">
<pattern value="(\+[0-9]{1,3}\.[0-9]{1,14})?"/>
<maxLength value="17"/>
</restriction>
</simpleType>
<simpleType name="pcType">
<restriction base="token">
<maxLength value="16"/>
</restriction>
</simpleType>
<simpleType name="postalLineType">
<restriction base="normalizedString">
<minLength value="1"/>
<maxLength value="255"/>
</restriction>
</simpleType>
<simpleType name="optPostalLineType">
<restriction base="normalizedString">
<maxLength value="255"/>
</restriction>
</simpleType>
<!--
Child elements of the <create> command.
-->
<complexType name="createType">
<sequence>
<element name="id" type="eppcom:clIDType"/>
<element name="postalInfo" type="contact:postalInfoType"
maxOccurs="2"/>
<element name="voice" type="contact:e164Type"
minOccurs="0"/>
<element name="fax" type="contact:e164Type"
minOccurs="0"/>
<element name="email" type="eppcom:minTokenType"/>
<element name="authInfo" type="contact:authInfoType"/>
<element name="disclose" type="contact:discloseType"
minOccurs="0"/>
</sequence>
</complexType>
<complexType name="postalInfoType">
<sequence>
<element name="name" type="contact:postalLineType"/>
<element name="org" type="contact:optPostalLineType"
minOccurs="0"/>
<element name="addr" type="contact:addrType"/>
</sequence>
<attribute name="type" type="contact:postalInfoEnumType"
use="required"/>
</complexType>
<simpleType name="postalInfoEnumType">
<restriction base="token">
<enumeration value="loc"/>
<enumeration value="int"/>
</restriction>
</simpleType>
<complexType name="addrType">
<sequence>
<element name="street" type="contact:optPostalLineType"
minOccurs="0" maxOccurs="3"/>
<element name="city" type="contact:postalLineType"/>
<element name="sp" type="contact:optPostalLineType"
minOccurs="0"/>
<element name="pc" type="contact:pcType"
minOccurs="0"/>
<element name="cc" type="contact:ccType"/>
</sequence>
</complexType>
<complexType name="authInfoType">
<choice>
<element name="pw" type="eppcom:pwAuthInfoType"/>
<element name="ext" type="eppcom:extAuthInfoType"/>
</choice>
</complexType>
<complexType name="discloseType">
<sequence>
<element name="name" type="contact:intLocType"
minOccurs="0" maxOccurs="2"/>
<element name="org" type="contact:intLocType"
minOccurs="0" maxOccurs="2"/>
<element name="addr" type="contact:intLocType"
minOccurs="0" maxOccurs="2"/>
<element name="voice" minOccurs="0"/>
<element name="fax" minOccurs="0"/>
<element name="email" minOccurs="0"/>
</sequence>
<attribute name="flag" type="boolean" use="required"/>
</complexType>
<complexType name="intLocType">
<attribute name="type" type="contact:postalInfoEnumType"
use="required"/>
</complexType>
<!--
Child element of commands that require only an identifier.
-->
<complexType name="sIDType">
<sequence>
<element name="id" type="eppcom:clIDType"/>
</sequence>
</complexType>
<!--
Child element of commands that accept multiple identifiers.
-->
<complexType name="mIDType">
<sequence>
<element name="id" type="eppcom:clIDType"
maxOccurs="unbounded"/>
</sequence>
</complexType>
<!--
Child elements of the <info> and <transfer> commands.
-->
<complexType name="authIDType">
<sequence>
<element name="id" type="eppcom:clIDType"/>
<element name="authInfo" type="contact:authInfoType"
minOccurs="0"/>
</sequence>
</complexType>
<!--
Child elements of the <update> command.
-->
<complexType name="updateType">
<sequence>
<element name="id" type="eppcom:clIDType"/>
<element name="add" type="contact:addRemType"
minOccurs="0"/>
<element name="rem" type="contact:addRemType"
minOccurs="0"/>
<element name="chg" type="contact:chgType"
minOccurs="0"/>
</sequence>
</complexType>
<!--
Data elements that can be added or removed.
-->
<complexType name="addRemType">
<sequence>
<element name="status" type="contact:statusType"
maxOccurs="7"/>
</sequence>
</complexType>
<!--
Data elements that can be changed.
-->
<complexType name="chgType">
<sequence>
<element name="postalInfo" type="contact:chgPostalInfoType"
minOccurs="0" maxOccurs="2"/>
<element name="voice" type="contact:e164Type"
minOccurs="0"/>
<element name="fax" type="contact:e164Type"
minOccurs="0"/>
<element name="email" type="eppcom:minTokenType"
minOccurs="0"/>
<element name="authInfo" type="contact:authInfoType"
minOccurs="0"/>
<element name="disclose" type="contact:discloseType"
minOccurs="0"/>
</sequence>
</complexType>
<complexType name="chgPostalInfoType">
<sequence>
<element name="name" type="contact:postalLineType"
minOccurs="0"/>
<element name="org" type="contact:optPostalLineType"
minOccurs="0"/>
<element name="addr" type="contact:addrType"
minOccurs="0"/>
</sequence>
<attribute name="type" type="contact:postalInfoEnumType"
use="required"/>
</complexType>
<!--
Child response elements.
-->
<element name="chkData" type="contact:chkDataType"/>
<element name="creData" type="contact:creDataType"/>
<element name="infData" type="contact:infDataType"/>
<element name="panData" type="contact:panDataType"/>
<element name="trnData" type="contact:trnDataType"/>
<!--
<check> response elements.
-->
<complexType name="chkDataType">
<sequence>
<element name="cd" type="contact:checkType"
maxOccurs="unbounded"/>
</sequence>
</complexType>
<complexType name="checkType">
<sequence>
<element name="id" type="contact:checkIDType"/>
<element name="reason" type="eppcom:reasonType"
minOccurs="0"/>
</sequence>
</complexType>
<complexType name="checkIDType">
<simpleContent>
<extension base="eppcom:clIDType">
<attribute name="avail" type="boolean"
use="required"/>
</extension>
</simpleContent>
</complexType>
<!--
<create> response elements.
-->
<complexType name="creDataType">
<sequence>
<element name="id" type="eppcom:clIDType"/>
<element name="crDate" type="dateTime"/>
</sequence>
</complexType>
<!--
<info> response elements.
-->
<complexType name="infDataType">
<sequence>
<element name="id" type="eppcom:clIDType"/>
<element name="roid" type="eppcom:roidType"/>
<element name="status" type="contact:statusType"
maxOccurs="7"/>
<element name="postalInfo" type="contact:postalInfoType"
maxOccurs="2"/>
<element name="voice" type="contact:e164Type"
minOccurs="0"/>
<element name="fax" type="contact:e164Type"
minOccurs="0"/>
<element name="email" type="eppcom:minTokenType"/>
<element name="clID" type="eppcom:clIDType"/>
<element name="crID" type="eppcom:clIDType"/>
<element name="crDate" type="dateTime"/>
<element name="upID" type="eppcom:clIDType"
minOccurs="0"/>
<element name="upDate" type="dateTime"
minOccurs="0"/>
<element name="trDate" type="dateTime"
minOccurs="0"/>
<element name="authInfo" type="contact:authInfoType"
minOccurs="0"/>
<element name="disclose" type="contact:discloseType"
minOccurs="0"/>
</sequence>
</complexType>
<!--
Status is a combination of attributes and an optional human-readable
message that may be expressed in languages other than English.
-->
<complexType name="statusType">
<simpleContent>
<extension base="normalizedString">
<attribute name="s" type="contact:statusValueType"
use="required"/>
<attribute name="lang" type="language"
default="en"/>
</extension>
</simpleContent>
</complexType>
<simpleType name="statusValueType">
<restriction base="token">
<enumeration value="clientDeleteProhibited"/>
<enumeration value="clientTransferProhibited"/>
<enumeration value="clientUpdateProhibited"/>
<enumeration value="linked"/>
<enumeration value="ok"/>
<enumeration value="pendingCreate"/>
<enumeration value="pendingDelete"/>
<enumeration value="pendingTransfer"/>
<enumeration value="pendingUpdate"/>
<enumeration value="serverDeleteProhibited"/>
<enumeration value="serverTransferProhibited"/>
<enumeration value="serverUpdateProhibited"/>
</restriction>
</simpleType>
<!--
Pending action notification response elements.
-->
<complexType name="panDataType">
<sequence>
<element name="id" type="contact:paCLIDType"/>
<element name="paTRID" type="epp:trIDType"/>
<element name="paDate" type="dateTime"/>
</sequence>
</complexType>
<complexType name="paCLIDType">
<simpleContent>
<extension base="eppcom:clIDType">
<attribute name="paResult" type="boolean"
use="required"/>
</extension>
</simpleContent>
</complexType>
<!--
<transfer> response elements.
-->
<complexType name="trnDataType">
<sequence>
<element name="id" type="eppcom:clIDType"/>
<element name="trStatus" type="eppcom:trStatusType"/>
<element name="reID" type="eppcom:clIDType"/>
<element name="reDate" type="dateTime"/>
<element name="acID" type="eppcom:clIDType"/>
<element name="acDate" type="dateTime"/>
</sequence>
</complexType>
<!--
End of schema.
-->
</schema>
END
5. Internationalization Considerations
EPP is represented in XML, which provides native support for encoding
information using the Unicode character set and its more compact
representations including UTF-8. Conformant XML processors recognize
both UTF-8 and UTF-16 [RFC2781]. Though XML includes provisions to
identify and use other character encodings through use of an
"encoding" attribute in an <?xml?> declaration, use of UTF-8 is
RECOMMENDED in environments where parser encoding support
incompatibility exists.
All date-time values presented via EPP MUST be expressed in Universal
Coordinated Time using the Gregorian calendar. The XML Schema allows
use of time zone identifiers to indicate offsets from the zero
meridian, but this option MUST NOT be used with EPP. The extended
date-time form using upper case "T" and "Z" characters defined in
[W3C.REC-xmlschema-2-20041028] MUST be used to represent date-time
values, as the XML Schema does not support truncated date-time forms
or lower case "T" and "Z" characters.
Humans, organizations, and other entities often need to represent
social information in both a commonly understood character set and a
locally optimized character set. This specification provides
features allowing representation of social information in both a
subset of UTF-8 for broad readability and unrestricted UTF-8 for
local optimization.
6. IANA Considerations
This document uses URNs to describe XML namespaces and XML schemas
conforming to a registry mechanism described in [RFC3688]. Two URI
assignments have been registered by the IANA.
Registration request for the contact namespace:
URI: urn:ietf:params:xml:ns:contact-1.0
Registrant Contact: See the "Author's Address" section of this
document.
XML: None. Namespace URIs do not represent an XML specification.
Registration request for the contact XML schema:
URI: urn:ietf:params:xml:schema:contact-1.0
Registrant Contact: See the "Author's Address" section of this
document.
XML: See the "Formal Syntax" section of this document.
7. Security Considerations
Authorization information as described in Section 2.8 is REQUIRED to
create a contact object. This information is used in some query and
transfer operations as an additional means of determining client
authorization to perform the command. Failure to protect
authorization information from inadvertent disclosure can result in
unauthorized transfer operations and unauthorized information
release. Both client and server MUST ensure that authorization
information is stored and exchanged with high-grade encryption
mechanisms to provide privacy services.
The object mapping described in this document does not provide any
other security services or introduce any additional considerations
beyond those described by [RFC5730] or those caused by the protocol
layers used by EPP.
8. Acknowledgements
RFC 3733 is a product of the PROVREG working group, which suggested
improvements and provided many invaluable comments. The author
wishes to acknowledge the efforts of WG chairs Edward Lewis and Jaap
Akkerhuis for their process and editorial contributions. RFC 4933
and this document are individual submissions, based on the work done
in RFC 3733.
Specific suggestions that have been incorporated into this document
were provided by Chris Bason, Eric Brunner-Williams, Jordyn Buchanan,
Robert Burbidge, Dave Crocker, Ayesha Damaraju, Anthony Eden, Sheer
El-Showk, Dipankar Ghosh, Klaus Malorny, Dan Manley, Michael
Mealling, Patrick Mevzek, Asbjorn Steira, and Rick Wesson.
9. References
9.1. Normative References
[ISO3166-1]
International Organization for Standardization, "Codes for
the representation of names of countries and their
subdivisions -- Part 1: Country codes", ISO Standard 3166,
November 2006.
[ITU.E164.2005]
International Telecommunication Union, "The international
public telecommunication numbering plan", ITU-
T Recommendation E.164, February 2005.
[RFC2119] Bradner, S., "Key words for use in RFCs to Indicate
Requirement Levels", BCP 14, RFC 2119, March 1997.
[RFC3629] Yergeau, F., "UTF-8, a transformation format of ISO
10646", STD 63, RFC 3629, November 2003.
[RFC3688] Mealling, M., "The IETF XML Registry", BCP 81, RFC 3688,
January 2004.
[RFC5322] Resnick, P., Ed., "Internet Message Format", RFC 5322,
October 2008.
[RFC5730] Hollenbeck, S., "Extensible Provisioning Protocol (EPP)",
STD 69, RFC 5730, August 2009.
[W3C.REC-xml-20040204]
Sperberg-McQueen, C., Maler, E., Yergeau, F., Paoli, J.,
and T. Bray, "Extensible Markup Language (XML) 1.0 (Third
Edition)", World Wide Web Consortium FirstEdition REC-xml-
20040204, February 2004,
<http://www.w3.org/TR/2004/REC-xml-20040204>.
[W3C.REC-xmlschema-1-20041028]
Maloney, M., Thompson, H., Mendelsohn, N., and D. Beech,
"XML Schema Part 1: Structures Second Edition", World Wide
Web Consortium Recommendation REC-xmlschema-1-20041028,
October 2004,
<http://www.w3.org/TR/2004/REC-xmlschema-1-20041028>.
[W3C.REC-xmlschema-2-20041028]
Malhotra, A. and P. Biron, "XML Schema Part 2: Datatypes
Second Edition", World Wide Web Consortium
Recommendation REC-xmlschema-2-20041028, October 2004,
<http://www.w3.org/TR/2004/REC-xmlschema-2-20041028>.
9.2. Informative References
[RFC2781] Hoffman, P. and F. Yergeau, "UTF-16, an encoding of ISO
10646", RFC 2781, February 2000.
[RFC4933] Hollenbeck, S., "Extensible Provisioning Protocol (EPP)
Contact Mapping", RFC 4933, May 2007.
Appendix A. Changes from RFC 4933
1. Changed "This document obsoletes RFC 3733" to "This document
obsoletes RFC 4933".
2. Replaced references to RFC 0822 with references to 5322.
3. Replaced references to RFC 3733 with references to 4933.
4. Replaced references to RFC 4930 with references to 5730.
5. Updated reference to ISO 3166-1.
6. Removed pendingRenew status from Section 2.2 because this
document does not define a mapping for the EPP <renew> command.
7. Modified text in Section 3.2.2 to include 2305 response code.
8. Updated Section 5.
9. Added "Other notification methods MAY be used in addition to the
required service message" in Section 3.2.
10. Added 2201 response code text in Section 3.2.
11. Added BSD license text to XML schema section.
Author's Address
Scott Hollenbeck
VeriSign, Inc.
21345 Ridgetop Circle
Dulles, VA 20166-6503
US
EMail: shollenbeck@verisign.com
Network Working Group S. Hollenbeck
Request for Comments: 5734 VeriSign, Inc.
STD: 69 August 2009
Obsoletes: 4934
Category: Standards Track
Extensible Provisioning Protocol (EPP) Transport over TCP
Abstract
This document describes how an Extensible Provisioning Protocol (EPP)
session is mapped onto a single Transmission Control Protocol (TCP)
connection. This mapping requires use of the Transport Layer
Security (TLS) protocol to protect information exchanged between an
EPP client and an EPP server. This document obsoletes RFC 4934.
Status of This Memo
This document specifies an Internet standards track protocol for the
Internet community, and requests discussion and suggestions for
improvements. Please refer to the current edition of the "Internet
Official Protocol Standards" (STD 1) for the standardization state
and status of this protocol. Distribution of this memo is unlimited.
Copyright Notice
Copyright (c) 2009 IETF Trust and the persons identified as the
document authors. All rights reserved.
This document is subject to BCP 78 and the IETF Trust's Legal
Provisions Relating to IETF Documents in effect on the date of
publication of this document (http://trustee.ietf.org/license-info).
Please review these documents carefully, as they describe your rights
and restrictions with respect to this document.
Table of Contents
1. Introduction ....................................................2
1.1. Conventions Used in This Document ..........................2
2. Session Management ..............................................2
3. Message Exchange ................................................3
4. Data Unit Format ................................................6
5. Transport Considerations ........................................6
6. Internationalization Considerations .............................7
7. IANA Considerations .............................................7
8. Security Considerations .........................................7
9. TLS Usage Profile ...............................................8
10. Acknowledgements ..............................................11
11. References ....................................................11
11.1. Normative References .....................................11
11.2. Informative References ...................................12
Appendix A. Changes from RFC 4934 ................................13
1. Introduction
This document describes how the Extensible Provisioning Protocol
(EPP) is mapped onto a single client-server TCP connection. Security
services beyond those defined in EPP are provided by the Transport
Layer Security (TLS) Protocol [RFC2246]. EPP is described in
[RFC5730]. TCP is described in [RFC0793]. This document obsoletes
RFC 4934 [RFC4934].
1.1. Conventions Used in This Document
The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT",
"SHOULD", "SHOULD NOT", "RECOMMENDED", "MAY", and "OPTIONAL" in this
document are to be interpreted as described in [RFC2119].
2. Session Management
Mapping EPP session management facilities onto the TCP service is
straightforward. An EPP session first requires creation of a TCP
connection between two peers, one that initiates the connection
request and one that responds to the connection request. The
initiating peer is called the "client", and the responding peer is
called the "server". An EPP server MUST listen for TCP connection
requests on a standard TCP port assigned by IANA.
The client MUST issue an active OPEN call, specifying the TCP port
number on which the server is listening for EPP connection attempts.
The EPP server MUST return an EPP <greeting> to the client after the
TCP session has been established.
An EPP session is normally ended by the client issuing an EPP
<logout> command. A server receiving an EPP <logout> command MUST
end the EPP session and close the TCP connection with a CLOSE call.
A client MAY end an EPP session by issuing a CLOSE call.
A server MAY limit the life span of an established TCP connection.
EPP sessions that are inactive for more than a server-defined period
MAY be ended by a server issuing a CLOSE call. A server MAY also
close TCP connections that have been open and active for longer than
a server-defined period.
3. Message Exchange
With the exception of the EPP server greeting, EPP messages are
initiated by the EPP client in the form of EPP commands. An EPP
server MUST return an EPP response to an EPP command on the same TCP
connection that carried the command. If the TCP connection is closed
after a server receives and successfully processes a command but
before the response can be returned to the client, the server MAY
attempt to undo the effects of the command to ensure a consistent
state between the client and the server. EPP commands are
idempotent, so processing a command more than once produces the same
net effect on the repository as successfully processing the command
once.
An EPP client streams EPP commands to an EPP server on an established
TCP connection. A client MUST NOT distribute commands from a single
EPP session over multiple TCP connections. A client MAY establish
multiple TCP connections to support multiple EPP sessions with each
session mapped to a single connection. A server SHOULD limit a
client to a maximum number of TCP connections based on server
capabilities and operational load.
EPP describes client-server interaction as a command-response
exchange where the client sends one command to the server and the
server returns one response to the client. A client might be able to
realize a slight performance gain by pipelining (sending more than
one command before a response for the first command is received)
commands with TCP transport, but this feature does not change the
basic single command, single response operating mode of the core
protocol.
Each EPP data unit MUST contain a single EPP message. Commands MUST
be processed independently and in the same order as sent from the
client.
A server SHOULD impose a limit on the amount of time required for a
client to issue a well-formed EPP command. A server SHOULD end an
EPP session and close an open TCP connection if a well-formed command
is not received within the time limit.
A general state machine for an EPP server is described in Section 2
of [RFC5730]. General client-server message exchange using TCP
transport is illustrated in Figure 1.
Client Server
| |
| Connect |
| >>------------------------------->> |
| |
| Send Greeting |
| <<-------------------------------<< |
| |
| Send <login> |
| >>------------------------------->> |
| |
| Send Response |
| <<-------------------------------<< |
| |
| Send Command |
| >>------------------------------->> |
| |
| Send Response |
| <<-------------------------------<< |
| |
| Send Command X |
| >>------------------------------->> |
| |
| Send Command Y |
| >>---------------+ |
| | |
| | |
| Send Response X |
| <<---------------(---------------<< |
| | |
| | |
| +--------------->> |
| |
| Send Response Y |
| <<-------------------------------<< |
| |
| Send <logout> |
| >>------------------------------->> |
| |
| Send Response & Disconnect |
| <<-------------------------------<< |
| |
Figure 1: TCP Client-Server Message Exchange
4. Data Unit Format
The EPP data unit contains two fields: a 32-bit header that describes
the total length of the data unit, and the EPP XML instance. The
length of the EPP XML instance is determined by subtracting four
octets from the total length of the data unit. A receiver must
successfully read that many octets to retrieve the complete EPP XML
instance before processing the EPP message.
EPP Data Unit Format (one tick mark represents one bit position):
0 1 2 3
0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Total Length |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| EPP XML Instance |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+//-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
Total Length (32 bits): The total length of the EPP data unit
measured in octets in network (big endian) byte order. The octets
contained in this field MUST be included in the total length
calculation.
EPP XML Instance (variable length): The EPP XML instance carried in
the data unit.
5. Transport Considerations
Section 2.1 of the EPP core protocol specification [RFC5730]
describes considerations to be addressed by protocol transport
mappings. This document addresses each of the considerations using a
combination of features described in this document and features
provided by TCP as follows:
- TCP includes features to provide reliability, flow control,
ordered delivery, and congestion control. Section 1.5 of RFC 793
[RFC0793] describes these features in detail; congestion control
principles are described further in RFC 2581 [RFC2581] and RFC
2914 [RFC2914]. TCP is a connection-oriented protocol, and
Section 2 of this document describes how EPP sessions are mapped
to TCP connections.
- Sections 2 and 3 of this document describe how the stateful nature
of EPP is preserved through managed sessions and controlled
message exchanges.
- Section 3 of this document notes that command pipelining is
possible with TCP, though batch-oriented processing (combining
multiple EPP commands in a single data unit) is not permitted.
- Section 4 of this document describes features to frame data units
by explicitly specifying the number of octets used to represent a
data unit.
6. Internationalization Considerations
This document does not introduce or present any internationalization
or localization issues.
7. IANA Considerations
System port number 700 has been assigned by the IANA for mapping EPP
onto TCP.
User port number 3121 (which was used for development and test
purposes) has been reclaimed by the IANA.
8. Security Considerations
EPP as-is provides only simple client authentication services using
identifiers and plain text passwords. A passive attack is sufficient
to recover client identifiers and passwords, allowing trivial command
forgery. Protection against most other common attacks MUST be
provided by other layered protocols.
When layered over TCP, the Transport Layer Security (TLS) Protocol
version 1.0 [RFC2246] or its successors (such as TLS 1.2 [RFC5246]),
using the latest version supported by both parties, MUST be used to
provide integrity, confidentiality, and mutual strong client-server
authentication. Implementations of TLS often contain a weak
cryptographic mode that SHOULD NOT be used to protect EPP. Clients
and servers desiring high security SHOULD instead use TLS with
cryptographic algorithms that are less susceptible to compromise.
Authentication using the TLS Handshake Protocol confirms the identity
of the client and server machines. EPP uses an additional client
identifier and password to identify and authenticate the client's
user identity to the server, supplementing the machine authentication
provided by TLS. The identity described in the client certificate
and the identity described in the EPP client identifier can differ,
as a server can assign multiple user identities for use from any
particular client machine. Acceptable certificate identities MUST be
negotiated between client operators and server operators using an
out-of-band mechanism. Presented certificate identities MUST match
negotiated identities before EPP service is granted.
There is a risk of login credential compromise if a client does not
properly identify a server before attempting to establish an EPP
session. Before sending login credentials to the server, a client
needs to confirm that the server certificate received in the TLS
handshake is an expected certificate for the server. A client also
needs to confirm that the greeting received from the server contains
expected identification information. After establishing a TLS
session and receiving an EPP greeting on a protected TCP connection,
clients MUST compare the certificate subject and/or subjectAltName to
expected server identification information and abort processing if a
mismatch is detected. If certificate validation is successful, the
client then needs to ensure that the information contained in the
received certificate and greeting is consistent and appropriate. As
described above, both checks typically require an out-of-band
exchange of information between client and server to identify
expected values before in-band connections are attempted.
EPP TCP servers are vulnerable to common TCP denial-of-service
attacks including TCP SYN flooding. Servers SHOULD take steps to
minimize the impact of a denial-of-service attack using combinations
of easily implemented solutions, such as deployment of firewall
technology and border router filters to restrict inbound server
access to known, trusted clients.
9. TLS Usage Profile
The client should initiate a connection to the server and then send
the TLS Client Hello to begin the TLS handshake. When the TLS
handshake has finished, the client can then send the first EPP
message.
TLS implementations are REQUIRED to support the mandatory cipher
suite specified in the implemented version:
o TLS 1.0 [RFC2246]: TLS_DHE_DSS_WITH_3DES_EDE_CBC_SHA
o TLS 1.1 [RFC4346]: TLS_RSA_WITH_3DES_EDE_CBC_SHA
o TLS 1.2 [RFC5246]: TLS_RSA_WITH_AES_128_CBC_SHA
This document is assumed to apply to future versions of TLS, in which
case the mandatory cipher suite for the implemented version MUST be
supported.
Mutual client and server authentication using the TLS Handshake
Protocol is REQUIRED. Signatures on the complete certification path
for both client machine and server machine MUST be validated as part
of the TLS handshake. Information included in the client and server
certificates, such as validity periods and machine names, MUST also
be validated. A complete description of the issues associated with
certification path validation can be found in RFC 5280 [RFC5280].
EPP service MUST NOT be granted until successful completion of a TLS
handshake and certificate validation, ensuring that both the client
machine and the server machine have been authenticated and
cryptographic protections are in place.
If the client has external information as to the expected identity of
the server, the server name check MAY be omitted. For instance, a
client may be connecting to a machine whose address and server name
are dynamic, but the client knows the certificate that the server
will present. In such cases, it is important to narrow the scope of
acceptable certificates as much as possible in order to prevent man-
in-the-middle attacks. In special cases, it might be appropriate for
the client to simply ignore the server's identity, but it needs to be
understood that this leaves the connection open to active attack.
During the TLS negotiation, the EPP client MUST check its
understanding of the server name / IP address against the server's
identity as presented in the server Certificate message in order to
prevent man-in-the-middle attacks. In this section, the client's
understanding of the server's identity is called the "reference
identity". Checking is performed according to the following rules in
the specified order:
o If the reference identity is a server name:
* If a subjectAltName extension of the dNSName [CCITT.X509.1988]
type is present in the server's certificate, then it SHOULD be
used as the source of the server's identity. Matching is
performed as described in Section 7.2 of [RFC5280], with the
exception that wildcard matching (see below) is allowed for
dNSName type. If the certificate contains multiple names
(e.g., more than one dNSName field), then a match with any one
of the fields is considered acceptable.
* The '*' (ASCII 42) wildcard character is allowed in
subjectAltName values of type dNSName, and then only as the
left-most (least significant) DNS label in that value. This
wildcard matches any left-most DNS label in the server name.
That is, the subject *.example.com matches the server names
a.example.com and b.example.com, but does not match example.com
or a.b.example.com.
* The server's identity MAY also be verified by comparing the
reference identity to the Common Name (CN) [RFC4519] value in
the leaf Relative Distinguished Name (RDN) of the subjectName
field of the server's certificate. This comparison is
performed using the rules for comparison of DNS names in bullet
1 above (including wildcard matching). Although the use of the
Common Name value is existing practice, it is deprecated, and
Certification Authorities are encouraged to provide
subjectAltName values instead. Note that the TLS
implementation may represent DNs in certificates according to
X.500 or other conventions. For example, some X.500
implementations order the RDNs in a DN using a left-to-right
(most significant to least significant) convention instead of
LDAP's right-to-left convention.
o If the reference identity is an IP address:
* The iPAddress subjectAltName SHOULD be used by the client for
comparison. In such a case, the reference identity MUST be
converted to the "network byte order" octet string
representation. For IP Version 4 (as specified in RFC 791
[RFC0791]), the octet string will contain exactly four octets.
For IP Version 6 (as specified in RFC 2460 [RFC2460]), the
octet string will contain exactly sixteen octets. This octet
string is then compared against subjectAltName values of type
iPAddress. A match occurs if the reference identity octet
string and value octet strings are identical.
If the server identity check fails, user-oriented clients SHOULD
either notify the user (clients MAY give the user the opportunity to
continue with the EPP session in this case) or close the transport
connection and indicate that the server's identity is suspect.
Automated clients SHOULD return or log an error indicating that the
server's identity is suspect and/or SHOULD close the transport
connection. Automated clients MAY provide a configuration setting
that disables this check, but MUST provide a setting which enables
it.
During the TLS negotiation, the EPP server MUST verify that the
client certificate matches the reference identity previously
negotiated out of band, as specified in Section 8. The server should
match the entire subject name or the subjectAltName as described in
RFC 5280. The server MAY enforce other restrictions on the
subjectAltName, for example if it knows that a particular client is
always connecting from a particular hostname / IP address.
All EPP messages MUST be sent as TLS "application data". It is
possible that multiple EPP messages are contained in one TLS record,
or that an EPP message is transferred in multiple TLS records.
When no data is received from a connection for a long time (where the
application decides what "long" means), a server MAY close the
connection. The server MUST attempt to initiate an exchange of
close_notify alerts with the client before closing the connection.
Servers that are unprepared to receive any more data MAY close the
connection after sending the close_notify alert, thus generating an
incomplete close on the client side.
10. Acknowledgements
RFC 3734 is a product of the PROVREG working group, which suggested
improvements and provided many invaluable comments. The author
wishes to acknowledge the efforts of WG chairs Edward Lewis and Jaap
Akkerhuis for their process and editorial contributions. RFC 4934
and this document are individual submissions, based on the work done
in RFC 3734.
Specific suggestions that have been incorporated into this document
were provided by Chris Bason, Randy Bush, Patrik Faltstrom, Ned
Freed, James Gould, Dan Manley, and John Immordino.
11. References
11.1. Normative References
[CCITT.X509.1988]
International Telephone and Telegraph Consultative
Committee, "Information Technology - Open Systems
Interconnection - The Directory: Authentication
Framework", CCITT Recommendation X.509, November 1988.
[RFC0791] Postel, J., "Internet Protocol", STD 5, RFC 791,
September 1981.
[RFC0793] Postel, J., "Transmission Control Protocol", STD 7,
RFC 793, September 1981.
[RFC2119] Bradner, S., "Key words for use in RFCs to Indicate
Requirement Levels", BCP 14, RFC 2119, March 1997.
[RFC2246] Dierks, T. and C. Allen, "The TLS Protocol Version 1.0",
RFC 2246, January 1999.
[RFC2460] Deering, S. and R. Hinden, "Internet Protocol, Version 6
(IPv6) Specification", RFC 2460, December 1998.
[RFC4519] Sciberras, A., "Lightweight Directory Access Protocol
(LDAP): Schema for User Applications", RFC 4519,
June 2006.
[RFC5730] Hollenbeck, S., "Extensible Provisioning Protocol (EPP)",
STD 69, RFC 5730, August 2009.
11.2. Informative References
[RFC2581] Allman, M., Paxson, V., and W. Stevens, "TCP Congestion
Control", RFC 2581, April 1999.
[RFC2914] Floyd, S., "Congestion Control Principles", BCP 41,
RFC 2914, September 2000.
[RFC4346] Dierks, T. and E. Rescorla, "The Transport Layer Security
(TLS) Protocol Version 1.1", RFC 4346, April 2006.
[RFC4934] Hollenbeck, S., "Extensible Provisioning Protocol (EPP)
Transport Over TCP", RFC 4934, May 2007.
[RFC5246] Dierks, T. and E. Rescorla, "The Transport Layer Security
(TLS) Protocol Version 1.2", RFC 5246, August 2008.
[RFC5280] Cooper, D., Santesson, S., Farrell, S., Boeyen, S.,
Housley, R., and W. Polk, "Internet X.509 Public Key
Infrastructure Certificate and Certificate Revocation List
(CRL) Profile", RFC 5280, May 2008.
Appendix A. Changes from RFC 4934
1. Changed "This document obsoletes RFC 3734" to "This document
obsoletes RFC 4934".
2. Replaced references to RFC 3280 with references to 5280.
3. Replaced references to RFC 3734 with references to 4934.
4. Updated references to RFC 4346 and TLS 1.1 with references to
5246 and TLS 1.2.
5. Replaced references to RFC 4930 with references to 5730.
6. Added clarifying TLS Usage Profile section and included
references.
7. Moved the paragraph that begins with "Mutual client and server
authentication" from the Security Considerations section to the
TLS Usage Profile section.
Author's Address
Scott Hollenbeck
VeriSign, Inc.
21345 Ridgetop Circle
Dulles, VA 20166-6503
US
EMail: shollenbeck@verisign.com